Cree, Laurie, author
W.B Saunders, 1989
Buku Teks
Cree, Laurie, author
W.B. Saunders, 1991
Buku Teks
Foss, Mark, author
Prentice-Hall, 2000
Buku Teks
Hills, Marcia, author
Springer, 2011
Buku Teks
edited by Susan M. Hincliff
Churchill livingstone , 1979
Buku Teks