APA (7th ed.) Citation

Kumar, H. D., & Singh, H. N. (1979). A textbook on algae (2nd ed.). Macmillan.

Chicago Style (17th ed.) Citation

Kumar, H. D., and H. N. Singh. A Textbook on Algae. 2nd ed. London ; New York: Macmillan, 1979.

MLA (9th ed.) Citation

Kumar, H. D., and H. N. Singh. A Textbook on Algae. 2nd ed. Macmillan, 1979.