Turner, Paul
Macmillan, 1993
Buku Referensi
Turner, Paul
Macmillan, 1994
Buku Referensi
Karb, Virginia Burke
Mosby , 1996
Buku Teks SO
Ehrenpreis, Seymour
McGraw-Hill, 2001
Buku Referensi
Swartz, Harry
Medical Economics Company Inc., 1981
Buku Referensi