Hurn, Christopher J.
Allyn and Bacon, 1993
Buku Teks
Levine, Daniel U.
Allyn and Bacon, 1992
Buku Teks
Stevens, Edward
McGraw-Hill, 1987
Buku Teks
Odum, Howard W., author
Longmans Green, 1951
Buku Teks
Odum, Howard W., author
Longmans Green, 1951
Buku Teks