edited by Basil J. Zitelli, Holly W. Davis
Mosby Elsevier, 2007
Buku Referensi
Broyles, Bonita E., author
Thomson Delmar Learning , 2006
Buku Teks
edited by William W. Hay, Myron J. Levin, Judith M. Sondheimer, Robin R. Deterding
McGraw-Hill, 2007
Buku Referensi
Barkin, Roger M., author
Binaputra Aksara, 1995
Buku Teks
edited by William W. Hay, Jr [and others]
Appleton & Lange, 1997
Buku Teks