Lengyel, Emil
Public Affairs Press , 1957
Buku Teks
editor, Brian J. Terry
Toppan Company, 1997
Buku Referensi
edited by Rondo Cameron
Oxford University Press, 1972
Buku Teks
Dimas Andhio Sunaryo
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2022
UI - Tesis Membership
Sampson, Anthony
Coronet Books, 1982
Buku Teks