edited by David W. Ewing
Harper & Brothers, 1958
Buku Teks
Ayres, Robert U.
McGraw-Hill, 1969
Buku Teks
Mashudi
Program Pascasarjana Universitas Indonesia, 1990
UI - Tesis Membership
Moran, Margaret C.
Peterson's, 2007
Buku Teks
Janne Happy Sjufriamin
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1982
UI - Skripsi Membership