Gallinger, George W.
Mass. Addison-Wesley , 1987
Buku Teks
Elfram Gomgom
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Tesis Membership
Block, Stanley B.
Japan Toppan, 1990
Buku Teks
Higgins, Robert C.
McGraw-Hill, 2000
Buku Teks
Florensia Restian Dwi Anggraini
2016
UI - Tesis Membership