APA

Ehrlich P. R., Holm R. W., . (1963). The process of evolution. New York: McGraw-Hill.

Chicago

Ehrlich Paul R, Holm Richard W, . 1963. The process of evolution. New York: McGraw-Hill.

Harvard

Ehrlich P. R., Holm R. W., . (1963). The process of evolution. New York: McGraw-Hill.

MLA

Ehrlich Paul R, Holm Richard W, . The process of evolution. New York: McGraw-Hill. 1963.