APA

O'Brien J. A., . (1947). The origin of man. New York: Paulist Press.

Chicago

O'Brien John Anthony, . 1947. The origin of man. New York: Paulist Press.

Harvard

O'Brien J. A., . (1947). The origin of man. New York: Paulist Press.

MLA

O'Brien John Anthony, . The origin of man. New York: Paulist Press. 1947.