Edited by Arthur C. Beck, Jr., Ellis D. Hillmar
Reading, Massachusetts Addicon-Wesley Publishing , 1972
Buku Teks
Moonman, Eric, author
Pan Books, 1971
Buku Teks
Muhammad Iqbal, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Skripsi (Membership)
Nurbaya, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2004
UI - Tesis (Membership)
Dale, Ernest, author
McGraw-Hill, 1960
Buku Teks