Linton, Adrianne Dill, author
Elsevier Saunder, 2012
Buku Teks
Williams, Linda S., author
F.A. Davis, 2003
Buku Teks
Daniels, Rick, author
Delmar Cengage Learning, 2012
Buku Referensi
deWit, Susan C., author
Elsevier, 2013
Buku Teks
Luckmann, Joan, author
W.B. Saunders , 1980
Buku Teks