APA

Lawrence G. H. M., . (1951). Taxonomy of vascular plants. New York, New York, United States: Macmillan.

Chicago

Lawrence George H M, . 1951. Taxonomy of vascular plants. New York, New York, United States: Macmillan.

Harvard

Lawrence G. H. M., . (1951). Taxonomy of vascular plants. New York, New York, United States: Macmillan.

MLA

Lawrence George H M, . Taxonomy of vascular plants. New York, New York, United States: Macmillan. 1951.