Knock! Knock! / :  A Book of Laughs / 
Ill. B. Klunder. 
 - Toronto :  Houghton Mifflin Company,  1992. 
 - 32 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0-395-55977-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Childish literature--Short story
<br/><br/><label>Subjects--Index Terms: </label>Humorous stories