Torrance, Colin
Bailliere Tindall , 1997
Buku Teks
Wilson, Maureen
Bailliere Tindall , 1992
Buku Teks
edited by Pamela L. Swearingen
Mosby , 1996
Buku Teks
Burden, Nancy
W.B. Saunders Company, 2000
Buku Teks
Daniel, Rick
Delmar, Cengage Learning, 2012
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