APA (7th ed.) Citation

Seuss, D. (1990). One fish two fish red fish blue fish. Collins.

Chicago Style (17th ed.) Citation

Seuss, Dr. One Fish Two Fish Red Fish Blue Fish. Collins, 1990.

MLA (9th ed.) Citation

Seuss, Dr. One Fish Two Fish Red Fish Blue Fish. Collins, 1990.

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