Corty, Eric W., author
Mosby Elsevier, 2007
Buku Teks
Siegel, Sidney, author
McGraw-Hill, 1956
Buku Teks
Gravetter, Frederick J., author
Thomson Wadsworth, 2007
Buku Teks
Siegel, Sidney, author
McGraw-Hill , 1988
Buku Teks
Games, Paul A., author
McGraw-Hill, 1967
Buku Teks