Halacy, D.S.
Harper & Row, 1968
Buku Teks
Ahrens, C. Donald, author
Brooks/Cole, Cengage Learning, , 2011
Buku Teks
translated by Zhai Jiangyue
Guangxi University Press , 2005
Buku Teks
Arinto Muha Admojo, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2017
UI - Tesis (Membership)
Pedelaborde, Piere
Methuen , 1963
Buku Teks