APA

Round F. E., . (1973). The biology of the algae. New York: St. Martin's Press.

Chicago

Round Frank Eric, . 1973. The biology of the algae. New York: St. Martin's Press.

Harvard

Round F. E., . (1973). The biology of the algae. New York: St. Martin's Press.

MLA

Round Frank Eric, . The biology of the algae. New York: St. Martin's Press. 1973.