“Where can a burger get a great night’s sleep?”/“On a bed of lettuce.”

A hamburger riddle is:
 
Q: Where can a burger get a great night’s sleep?
A: On a bed of lettuce!
 
The joke was printed in the book One Hundred and One Hamburger Jokes (1978) by Phil Hirsch.
 
         
Google Books
One Hundred and One Hamburger Jokes
By Phil Hirsch
New York, NY: Scholastic, Incorporated
1978
Pg. 14:
Where can a burger get a great night’s sleep?
On a bed of lettuce!
 
Twitter
TweetTycoon.com‏
@TweetTycoon
Where can a burger get a great night’s sleep?On a bed of lettuce!
10:49 PM - 23 Jan 2010
   
Twitter
Morten Stenbaek‏
@mobitwix
Where can a burger get a great night´s sleep?On a bed of lettuce!
11:46 PM - 11 Feb 2010
 
Twitter
TheDozy‏
@TheDozy
Where can a burger get a great night’s sleep? On a bed of lettuce!
5:45 PM - 23 Feb 2010
   
Google Books
The Mammoth Book of Really Silly Jokes:
Humour for the whole family
Edited by Geoff Tibballs
London, UK: Constable & Robinson Ltd
2011
Pg. 112:
Where can a burger get a great night’s sleep?
On a bed of lettuce.
 
Twitter
foodeagle‏
@FoodEagle
Where can a burger get a great night’s sleep? On a bed of lettuce of course! @thumbsupburger
7:00 AM - 13 Oct 2016
 
Twitter
Lucky Score‏
@LuckyScoreNet
Where can a burger get a great night’s
sleep?
On a bed of lettuce!
#Joke from #BurgerJokes in #Jokes, #Humor and #Satire
6:59 PM - 19 Dec 2017