Citazione Stile APA (7a Edizione)

Collis, H., & Kohl, J. (1996). 101 American English riddles: Understanding language and culture through humor. Passportt Books.

Citazione stile Chigago Style (17a edizione)

Collis, Harry, e Joe Kohl. 101 American English Riddles: Understanding Language and Culture Through Humor. Lincolnwood, Ill: Passportt Books, 1996.

Citatione MLA (9a ed.)

Collis, Harry, e Joe Kohl. 101 American English Riddles: Understanding Language and Culture Through Humor. Passportt Books, 1996.