Starr, Cecie, author
Wadsworth, 1992
Buku Teks
Mader, Sylvia S., author
McGraw-Hill , 1998
Buku Teks
Campbell, Neil A., 1946-2004, author
The Benjamin/Cummings, 1994
Buku Teks
Wallace, Robert A., author
Harper Collins, 1992
Buku Teks
Beck, Raymond W., author
Burgess, 1977, 1977
Buku Teks