Cita APA (7th ed.)
Hopkins, D. M. (1967). The bering land bridge. Stanford University Press.
Cita Chicago (17th ed.)
Hopkins, David Moody. The Bering Land Bridge. Stanford, California: Stanford University Press, 1967.
Cita MLA (9th ed.)
Hopkins, David Moody. The Bering Land Bridge. Stanford University Press, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.