Helvie, Carl O., author
Sage, 1998
Buku Teks
Freeman, Ruth B., author
W.B. Saunders, 1981
Buku Teks
Freeman, Ruth B., author
W.B. Saunders, 1981
Buku Teks
Chichester, Myra, author
W.B. Saunders, 1995
Buku Teks
Smit, Claunadia M., author
W.B. Saunder , 1995
Buku Teks