Gordon, Bernard K.
Prentice-Hall, 1966
Buku Teks SO
Nigel J. D. Lucas, Jayaprakasan Ambali, Enggene Chang, Marinette S. Forbes-Ricarte, Ram Manohar Shrestha
McGraw-Hill, 1987
Buku Referensi
edited by Neera Chandhoke, Sanjay Kumar Agrawal
Routledge, 2013
Buku Teks SO
Greenwood, Gordon, 1913-1986
McGraw-Hill, 1974
Buku Teks SO
Editor by Damien Kingsbury
ISEAN , 2006
Buku Teks SO