“A car is useless in New York, essential everywhere else. The same with good manners”

American journalist and author Mignon McLaughlin (1913-1983) wrote in The Second Neurotic’s Notebook (1966) and The Complete Neurotic’s Notebook (1981):
 
“A car is useless in New York, essential everywhere else. The same with good manners.”
 
The quotation has been included in several quotation collections.
 
       
Wikiquote: Mignon McLaughlin
Mignon McLaughlin (June 6, 1913 – December 20, 1983) was an American journalist and author.
 
The Complete Neurotic’s Notebook (1981)
(...)
. A car is useless in New York, essential everywhere else. The same with good manners.
           
OCLC WorldCat record
The neurotic’s notebook.
Author: Mignon McLaughlin
Publisher: Indianapolis, Bobbs-Merrill [1963]
Edition/Format:   Print book : English
 
OCLC WorldCat record
The second neurotic’s notebook.
Author: Mignon McLaughlin
Publisher: Indianapolis, Bobbs-Merrill [1966]
Edition/Format:   Print book : Fiction : English
 
Newspapers.com
5 November 1966, The Daily Sikeston Standard (Sikeston, MO), pg. 2, col. 1:
A car is useless in New York, essential everywhere else. The same with good manners.
   
Google Books 
The Atlantic
Volume 218
1966
Pg. 106:
A car is useless in New York, essential everywhere else. So are good manners.
 
Newspapers.com
19 June 1970, Tooele (UT) Transcript, pg. 3, col. 6:
A car is useless in New York, essential everywhere else. The same with good manners.—Mignon McLaughlin. 
   
OCLC WorldCat record
The complete neurotic’s notebook
Author: Mignon McLaughlin
Publisher: [Secaucus, N.J.] : Castle Books, 1981.
Edition/Format:   Print book : English
 
13 June 1988, USA Today (McLean, VA), “Some of the places people love to pick on” by Arlene Vigoda, pg. 17E:
“A car is useless in New York, essential everywhere else. The same with good manners.” - Mignon McLaughlin, The Second Neurotics Notebook, 1966.
   
Google Books
Oxford Dictionary of Humorous Quotations
Edited by Gyles Brandreth
New York, NY: Oxford University Press
2013
Pg. 306:
A car is useless in New York, essential everywhere else.
Mignon McLaughlin 1913-1983 American writer, The Complete Neurotic’s Notebook (1981) 
 
Twitter
Quite Interesting
@qikipedia
A car is useless in New York, essential everywhere else. The same with good manners. MIGNON McLAUGHLIN (1913–83)
2:16 PM · Oct 1, 2012·Twitter Web Client
 
Google Books
The Little Red Book of New York Wisdom
By Ed Koch with Gregg Stebben
New York, NY: Skyhorse Publishing
2017
Pg. ?:
A car is useless in New York, essential everywhere else. The same with good manners.
MIGNON MCLAUGHLIN