Orum, Anthony M.
Blackwell, 2003
Buku Teks SO
edited by Andrew Blowers, Chris Hammett and Philip Sarre
Hutchinson Educational in association with the Open University Press, 1974
Buku Teks SO
Gutkind, E.A.
Free Press of Glencoe, 1963
Buku Teks SO
edited by Oscar Handlin and John Burchard
MIT Press and Harvard University, 1963
Buku Teks SO
Muhammad Cholil Mansyur
Usaha Nasional, [T.th.]
Buku Teks SO