APA

Ehrlich P. R., Holm R. W. & Ehrlich A. H. (1963). The process of evolution. New York: Mcgraw-Hill.

Chicago

Ehrlich Paul R, Holm Richard W and Ehrlich Anne H. 1963. The process of evolution. New York: Mcgraw-Hill.

Harvard

Ehrlich P. R., Holm R. W. and Ehrlich A. H. (1963). The process of evolution. New York: Mcgraw-Hill.

MLA

Ehrlich Paul R, Holm Richard W and Ehrlich Anne H. The process of evolution. New York: Mcgraw-Hill. 1963.