Gulley, Halbert E., author
Holt, Rinehart and Wiston, 1960
Buku Teks
editor, Lawrence R. Frey
Sage, 2002
Buku Teks
Marpaung, Artha Margareth, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Skripsi (Membership)
Prila Kinantya Dianingtyas, author
2019
UI - Tesis (Membership)
Evin Novianti, author
Universitas Indonesia, 2010
UI - Tesis (Open)