APA (7th ed.) Citation

Ziefert, H., & Rader, L. (1997). Sleepy-O! Houghton Mifflin.

Chicago Style (17th ed.) Citation

Ziefert, Harriet, and Laura Rader. Sleepy-O! Boston: Houghton Mifflin, 1997.

MLA (8th ed.) Citation

Ziefert, Harriet, and Laura Rader. Sleepy-O! Houghton Mifflin, 1997.

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