APA (7th ed.) Citation

Porter, C. L. (1967). Taxonomy of flowering plants (2nd ed.). Freeman.

Chicago Style (17th ed.) Citation

Porter, C. L. Taxonomy of Flowering Plants. 2nd ed. San Francisco: Freeman, 1967.

MLA (9th ed.) Citation

Porter, C. L. Taxonomy of Flowering Plants. 2nd ed. Freeman, 1967.