Jay I. Kislak Reference Collection (Library of Congress). (1973). Early man in America: Readings from Scientific American, with an introduction. W. H. Freeman.
Cita Chicago (17th ed.)Jay I. Kislak Reference Collection (Library of Congress). Early Man in America: Readings from Scientific American, with an Introduction. San Francisco: W. H. Freeman, 1973.
Cita MLA (9th ed.)Jay I. Kislak Reference Collection (Library of Congress). Early Man in America: Readings from Scientific American, with an Introduction. W. H. Freeman, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.