APA (7th ed.) Citation

Lilly, S. J. (2001). Arborists' certification study guide ([New and revised].). International Society of Arboriculture.

Chicago Style (17th ed.) Citation

Lilly, Sharon J. Arborists' Certification Study Guide. [New and revised]. Champaign, IL: International Society of Arboriculture, 2001.

MLA (9th ed.) Citation

Lilly, Sharon J. Arborists' Certification Study Guide. [New and revised]. International Society of Arboriculture, 2001.

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