APA

Willmer E. N., . (1960). Cytology and evolution. New York: Academic Press.

Chicago

Willmer E N, . 1960. Cytology and evolution. New York: Academic Press.

Harvard

Willmer E. N., . (1960). Cytology and evolution. New York: Academic Press.

MLA

Willmer E N, . Cytology and evolution. New York: Academic Press. 1960.