Diane Fraser, editor
Churchill livingstone , 2000
Buku Teks
Deloughery, Grace L.
Mosby, 1977
Buku Teks
Deane, Donna
Reston, 1985
Buku Teks
Simms, Lillian M., author
Delmar Publisher , 1985
Buku Teks
Barrie, Donald S., author
McGraw-Hill, 1978
Buku Teks