APA

Gould F. W., . (1968). Grass systematics. New York: McGraw-Hill.

Chicago

Gould Frank W, . 1968. Grass systematics. New York: McGraw-Hill.

Harvard

Gould F. W., . (1968). Grass systematics. New York: McGraw-Hill.

MLA

Gould Frank W, . Grass systematics. New York: McGraw-Hill. 1968.