Albrecht, Robert L.
John Wiley , 1978
Buku Teks SO
Odum, Eugene Pleasants, author
Saunders College, 1983
Buku Teks
Marshall, P.T., author
Macdonald and Evans, 1974
Buku Teks
Fryar, Maridell
National Textbook Co., 1979
Buku Teks
Hitner, Henry, author
McGraw-Hill, 1999
Buku Teks