Pelto, Gretel H.
Macmillan, 1979
Buku Teks SO
Ferraro, Gary P.
Cengage Learning, 2018
Buku Teks SO
Ferraro, Gary P.
Delmar Cengage Learning, 2014
Buku Teks SO
Harris, Marvin, 1927-2001
HarperCollins, 1991
Buku Teks SO
Nanda, Serena
Wadsworth, 1994
Buku Teks