Deane, Donna
Reston, 1985
Buku Teks
Morison, Luella J.
C.V. Mosby , 1965
Buku Teks
edited by Susan M. Hincliff
Churchill livingstone , 1979
Buku Teks
Torres, Gertrude
Practice-Hall , 1982
Buku Teks
Pohl, Margaret L., author
WM.C. Brown , 1978
Buku Teks