edited by John F. Muth and Gerald L. Thompson, with collaboration of Peter R. Winters
Prentice-Hall, 1963
Buku Teks
Sihotang, Hiras
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2001
UI - Tesis Membership
by Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1962
Buku Teks
Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1945
Buku Teks
Lundy, James L.
Eurasia Publishing House, 1968
Buku Teks