Routledge, 2018
Buku Teks SO
edited by Susan L. Feagin and Patrick Mayhard
Oxford University Press, 1997
Buku Teks
Ember, Carol R.
Prentice-Hall, 1985
Buku Teks
Haviland, William A.
Rinehart and Winston, 1974
Buku Teks
Morrison, Tony
Vintage Books, 2003
Buku Teks