Muller, Herbert J.
A Mentor Books, 1957
Buku Teks
Muller, Herbert J.
Oxford University Press , 1953
Buku Teks
McKay, John P., author
Houghton Miffiln, 1984
Buku Teks
Diamond, Jared, author
Norton, 2005
Buku Teks
Ralph, Philip Lee, author
E. P. Dutton & Co., 1954
Buku Teks