Fachri Irawan, author
Universitas Indonesia, 2014
UI - Skripsi (Membership)
Poitertials, James T.S.
Prentice-Hall, 1965
Buku Teks
Sornarajah, M, author
Cambridge University Press, 2017
Buku Teks
Dolzer, Rudolf
Oxford University Press, 2008
Buku Teks
Czinkota, Michael R., author
The Dryden Press, 1992
Buku Teks