APA (7th ed.) Citation

Lobel, A. (2011). Frog and toad together: I can read level 2. HarperCollins.

Chicago Style (17th ed.) Citation

Lobel, Arnold. Frog and Toad Together: I Can Read Level 2. New York: HarperCollins, 2011.

MLA (8th ed.) Citation

Lobel, Arnold. Frog and Toad Together: I Can Read Level 2. HarperCollins, 2011.

Warning: These citations may not always be 100% accurate.