APA (7th ed.) Citation

Atwater, F. (1938). Mr. Popper's penguins. Little.

Chicago Style (17th ed.) Citation

Atwater, Florence. Mr. Popper's Penguins. [S.l.]: Little, 1938.

MLA (9th ed.) Citation

Atwater, Florence. Mr. Popper's Penguins. Little, 1938.

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