Cuber, John F
Henry Holt And Company, 1951
Buku Teks
editor, John D. Montgomery and Timothy C. Weiskel
Pacific Basin Research Center Soka University, 1991
Buku Teks
Ryan C. L. Bullock
Cambridge University Press, 2012
eBooks
Elias, C.E. Jr
Wadsworth, 1965
Buku Teks
Sihombing, Ferawati
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2022
UI - Skripsi Membership