Montalbono, Michael, author
Science Research Associates, 1974
Buku Teks
Pollack, Solomon L., author
John Wiley & Sons, 1971
Buku Teks
Gildersleeve, Thomas R., author
Prentice-Hall, 1971
Buku Teks
edited by Clifford C. Carr and Terrell Croft
McGraw-Hill, 1996
Buku Teks
Estes, Jack C., 1922-1975, author
McGraw-Hill, 1976
Buku Teks