APA (7th ed.) Citation

Gray, A., Robinson, B. L., & Fernald, M. L. (1908). Gray's new manual of botany: A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada (7th ed.). American Book Co..

Chicago Style (17th ed.) Citation

Gray, Asa, Benjamin Lincoln Robinson, and Merritt Lyndon Fernald. Gray's New Manual of Botany: A Handbook of the Flowering Plants and Ferns of the Central and Northeastern United States and Adjacent Canada. 7th ed. New York: American Book Co., 1908.

MLA (8th ed.) Citation

Gray, Asa, et al. Gray's New Manual of Botany: A Handbook of the Flowering Plants and Ferns of the Central and Northeastern United States and Adjacent Canada. 7th ed. American Book Co., 1908.