Garfield, Paul J.
Prentice-Hall, 1964
Buku Teks
Lovejoy, Wallace F.
The John Hopkins Press , 1967
Buku Teks
Barnes, Irston R., author
Appleton Century Crofts, 1942
Buku Teks
Due, John F.
Richard D. Irwin, Inc., 1969
Buku Teks
Due, John F.
Richard D. Irwin, Inc., 1973
Buku Teks