Mouzon, Olin T.
Appleton-Century-Crofts, 1966
Buku Teks
Randall, Clarence B.
The University of Chicago Press, 1954
Buku Teks
Thorp, Willard L.
John Hopkins Press, 1954
Buku Teks
Krasner, Stephen D.
Princeton University Press, 1978
Buku Teks
Magdoff, Harry
Modern Reader Paperbacks, 1969
Buku Teks