Buku Teks SO
Bardjan
2016
UI - Makalah dan Kertas Kerja
Editor by Allen Ellis
Haworth Press, 1992
Buku Teks SO
edited by John M. Mackenzie
Manchester University Press, 1986
Buku Teks SO
edited by Peter Spearritt and David Walker
George Allen and Unwin, 1979
Buku Teks SO