APA (7th ed.) Citation

Swingle, D. B. (1946). A textbook of systematic botany (3d ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Swingle, Deane Bret. A Textbook of Systematic Botany. 3d ed. New York: McGraw-Hill, 1946.

MLA (9th ed.) Citation

Swingle, Deane Bret. A Textbook of Systematic Botany. 3d ed. McGraw-Hill, 1946.