Ellis, Janice Rider
Lippincott Williams & Wilkins, 2007
Buku Teks
Hartley, B.
Chapman and Hall, 1992
Buku Teks
Myers, David G.
Worth Publishers, 2001
Buku Teks
Ellis, Janice Rider
Lippincott , 1996
Buku Teks
Ellis, Janice Rider
J.B. Lippincott, 2007
Buku Teks