APA (7th ed.) Citation

Seuss, D. (1966). The 500 hats of Bartholomew Cubbins / by Dr. Seuss. Collins.

Chicago Style (17th ed.) Citation

Seuss, Dr. The 500 Hats of Bartholomew Cubbins / by Dr. Seuss. Collins, 1966.

MLA (9th ed.) Citation

Seuss, Dr. The 500 Hats of Bartholomew Cubbins / by Dr. Seuss. Collins, 1966.

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