Bailey, Thomas Andrew, 1902-1983, author
Prentice-Hall, 1980
Buku Teks
Bemis, Samuel Flagg, 1891-1973, author
Holt, Rinehart and Winston, 1965
Buku Teks
Ferrell, Robert H., author
W.W. Norton, 1959
Buku Teks
Prastika Apriliani Kusuma Putri, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2016
UI - Makalah dan Kertas Kerja
London, Kurt
D.van Nostrand Company,Inc., 1950
Buku Teks