Taylor, A.E. (Alfred Edward), 1869-1945
Doubleday, 1952
Buku Teks
Ulam, Adam Bruno
Beacon Press, 1973
Buku Teks
Herskovits, Melville J. (Melville Jean), 1895-1963
Alfred A. Knopf, 1967
Buku Teks
Thorndike, Edward Lee
Harvard University Press, 1943
Buku Teks
Taylor, A.E. (Alfred Edward), 1869-1945
University Paperbacks, 1960
Buku Teks