Horn, Paul V.
Prentice-Hall, 1959
Buku Teks
edited by Huxley Madeheim, Edward Mark Mazze and Charles S. Stein
Holt, Rinehart and Winston, 1963
Buku Teks
Krooss, Herman Edward, 1912-1975
Prentice-Hall, 1972
Buku Teks
Tangkilisan, Yuda Benharry
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2009
UI - Disertasi (Open)
Rudelius, William
Harcourt Brace Jovanovich , 1973
Buku Teks