APA (7th ed.) Citation

Parker, B. M., & Cowles, H. C. (1925). The book of plants. Houghton Mifflin Company.

Chicago Style (17th ed.) Citation

Parker, Bertha Morris, and Henry Chandler Cowles. The Book of Plants. Boston : New York: Houghton Mifflin Company, 1925.

MLA (8th ed.) Citation

Parker, Bertha Morris, and Henry Chandler Cowles. The Book of Plants. Houghton Mifflin Company, 1925.