Slowinski
Harcourt Brace Custom, 1996
Buku Teks
Weiner, Susan A., author
Thomson, Brooks/Cole, 2005
Buku Teks
Beran, J.A., author
John Wiley & Sons, 2009
Buku Teks
Beran, Jo A., author
John Wiley & Sons, 1982
Buku Teks
Cooper, Melanie M., author
McGraw-Hill, 2009
Buku Teks