Coleman, Verna
Melbourne University Press, Melbourne Univ. Press
Buku Teks
Clark, Mary Jo, author
Appleton & Lange , 1996
Buku Teks
edited by Victoria Schoolcraft
John Wiley & Sons, 1984
Buku Teks
Robinson, Lisa
W.B. Saunders , 1983
Buku Teks
Parkin, Andrew
Macmillan, 1982
Buku Teks