Silaban, Rekson, author
Friedrich Ebert Stiftng, 2009
Buku Teks
[publisher not identified], 1957
Buku Teks
D.C. U.S. Department of Labor , 1957
Buku Teks
Paradis, Adrian A., author
Julian Messner , 1964
Buku Teks
Scalapino, Robert A., author
Institute of East Asian Studies, University of California, 1983
Buku Teks