Greenstein, Ben, author
Elsevier, 2009
Buku Teks
Knapp, Rebecca Grant, author
John Wiley & Sons, 1978
Buku Teks
Fisher, Evryl E., author
Juta & Company Ltd., 1979
Buku Teks
Dennis, Lorraine Bradt, author
WB. Saunders, 1967
Buku Teks
edited by Sandra Stone
Mosby, 1984
Buku Teks