Citazione Stile APA (7a Edizione)

Lobel, A. (1970). Frog and toad are friends. Harper, an imprint of HarperCollinsPublishers.

Citazione stile Chigago Style (17a edizione)

Lobel, Arnold. Frog and Toad Are Friends. New York, NY: Harper, an imprint of HarperCollinsPublishers, 1970.

Citatione MLA (9a ed.)

Lobel, Arnold. Frog and Toad Are Friends. Harper, an imprint of HarperCollinsPublishers, 1970.