APA

Langman I. K., . (1964). A selected guide to the literature on the flowering plants of Mexico. Philadelphia: University of Pennsylvania Press.

Chicago

Langman Ida Kaplan, . 1964. A selected guide to the literature on the flowering plants of Mexico. Philadelphia: University of Pennsylvania Press.

Harvard

Langman I. K., . (1964). A selected guide to the literature on the flowering plants of Mexico. Philadelphia: University of Pennsylvania Press.

MLA

Langman Ida Kaplan, . A selected guide to the literature on the flowering plants of Mexico. Philadelphia: University of Pennsylvania Press. 1964.