Shlafer, Marshal, author
Addison-Wesley, 1993
Buku Referensi
Karch, Amy M., author
Lippincott , 2000
Buku Referensi
Abrams, Anne Collins, author
J.B. Lippincott , 1991
Buku Teks
Malseed, Roger, author
J.B. Lippincott , 1995
Buku Teks
Ropelewski-Ryan, Gail, author
J.B. Lippincott , 1995
Buku Teks