UNESCO, 1966
Buku Teks
Kinanti Desya Febrianti
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2023
UI - Skripsi (Membership)
by Arthur I. Gates [and others]
Macmillan, 1962
Buku Teks
Hoy, Anita Woolfolk, 1947-
Allyn and Bacon, 2004
Buku Teks
edited by Neil J. Salkind
Sage, 2011
Buku Teks