APA (7th ed.) Citation

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