APA

Lawrence G. H. M., . (1971). An introduction to plant taxonomy. New York: Macmillan.

Chicago

Lawrence George H M, . 1971. An introduction to plant taxonomy. New York: Macmillan.

Harvard

Lawrence G. H. M., . (1971). An introduction to plant taxonomy. New York: Macmillan.

MLA

Lawrence George H M, . An introduction to plant taxonomy. New York: Macmillan. 1971.