Gordon, Bernard K.
Prentice-Hall, 1966
Buku Teks SO
Vandenbosch, Amry
University of Kentucy Paperbacks, 1967
Buku Teks
McCloud, Donald G.
Westview Press, 1986
Buku Teks SO
Jan Nederveen Pieterse; Abdul Rahman Embong, Siew Yean Tham
Routledge Taylor et Francis Group, 2018
Buku Teks SO
edited by George McTurnan Kahin
Cornell University Press, 1959
Buku Teks