Odum, Eugene P. (Eugene Pleasants), author
Saunders College, 1983
Buku Teks
Cox, George W., author
Wm. C. Brown, 1996
Buku Teks
Smeins, Fred E., author
Drive Kendall/Hunt, 1978
Buku Teks
Smith, Robert Leo, author
Benjamin Cummings, 2001
Buku Teks
Southwick, Charles H., author
D. Van Nostrand, 1976
Buku Teks