Incoming Resources
- Knock, knock!, in order of appearance on our welcome mat, Saxton Freymann ... [et al.]
- Zany knock knocks, by Ronny M. Cole ; illustrated by Rich Garramone
- Laugh-out-loud Valentine's Day jokes for kids, Rob Elliott
- Laugh - out - loud jokes for kids, the big book of knock-knock jokes, Rob Elliot
- Door knockers, a book of knock-knock jokes, [written by] Michael Dahl ; illustrated by Brian Jensen
- Knock knock jokes, by Ima Laffin