Farrer, Helen
Churchill Livingstone , 1993
Buku Teks
Auvenshine, Martha Ann, author
Jones and Bartlett , 1990
Buku Teks
J.B. Lippincott Company, 1990
Buku Teks
Jensen, Margaret Duncan, 1921-
Mosby, 1977
Buku Teks
May, Katharyn Antle, author
J.B. Lippincott, 1994
Buku Teks