Armstrong, Amatullah
Ferozsons, 2001
Buku Referensi
Dofka, Charline M.
Delmar, Cengage Learning, 2007
Buku Teks
Moini, Jahangir
Delmar Cengage Learning, 2010
Buku Teks SO
Frenay, Agnes Clare
The catholic health association of the united states , 1984
Buku Teks
Ehrlich, Ann
Delmar Cengage Learning, 2013
Buku Teks SO