APA (7th ed.) Citation

Gray, A. (1950). Manual of botany: A handbook of the flowering plants and ferns of the central and north eastern United States and adjacent Canada. American Book Co.

Chicago Style (17th ed.) Citation

Gray, Asa. Manual of Botany: A Handbook of the Flowering Plants and Ferns of the Central and North Eastern United States and Adjacent Canada. New York: American Book Co, 1950.

MLA (9th ed.) Citation

Gray, Asa. Manual of Botany: A Handbook of the Flowering Plants and Ferns of the Central and North Eastern United States and Adjacent Canada. American Book Co, 1950.