Huebner, S. S., author
Prentice-Hall, 1982
Buku Teks
Huebner, S. S., author
Prentice-Hall, 1968
Buku Teks
Henrico Alexander, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1994
UI - Skripsi (Membership)
Bruce D. Mudget [and others]
Alexander Hamilton Institute, 1962
Buku Teks
Mowbray, Albert H.
McGraw-Hill, 1955
Buku Teks