edited by David W. Ewing
Harper & Brothers, 1958
Buku Teks
Davis, R.C.
Harper & Row, 1951
Buku Teks
Samei Komayadi
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Tesis Membership
edited by Albert Newgardsen
American Management Association, 1959
Buku Teks
Argenti, John
Wiley , 1974
Buku Teks