APA (7th ed.) Citation

Porter, C. L. (1967). Taxonomy of flowering plants (2d ed.). W. H. Freeman.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Porter, C. L. Taxonomy of Flowering Plants. 2d ed. W. H. Freeman, 1967.