APA (7th ed.) Citation

Humm, H. J. (1980). Introduction and guide to the marine bluegreen algae. John Wiley & Sons.

Chicago Style (17th ed.) Citation

Humm, Harold J. Introduction and Guide to the Marine Bluegreen Algae. New York: John Wiley & Sons, 1980.

MLA (9th ed.) Citation

Humm, Harold J. Introduction and Guide to the Marine Bluegreen Algae. John Wiley & Sons, 1980.