Garrison, Marsha
Thomson/West, 2009
Buku Teks
West Publishing Co, 1987
Buku Teks
Hammaker, Donna
Delmar Cengage Learning, 2011
Buku Teks
Blackman, Norman S.
Harwood Academic Publishers, 1990
Buku Referensi
Pozgar, George D.
Jones & Bartllett, 2010
Buku Teks