APA (7th ed.) Citation

Grenfell, D., & Shadrack, M. (2004). The color encyclopedia of hostas. Timber Press.

Chicago Style (17th ed.) Citation

Grenfell, Diana, and Michael Shadrack. The Color Encyclopedia of Hostas. Portland, Or.: Timber Press, 2004.

MLA (9th ed.) Citation

Grenfell, Diana, and Michael Shadrack. The Color Encyclopedia of Hostas. Timber Press, 2004.