pfeiffer, J. E. (1969). The Emergence of man. Harper & Row.
Cita Chicago (17th ed.)pfeiffer, John E. The Emergence of Man. New York: Harper & Row, 1969.
Cita MLA (9th ed.)pfeiffer, John E. The Emergence of Man. Harper & Row, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.