Merrit, Robert J.
Currency Press, 1978
Buku Teks
Matthews, Carole
Little, Brown & Co., 2015
Buku Teks
Sahgal, Nayantara
Alfred A. Knopf, 1954
Buku Teks
Ratih Djuwita Sari
Universitas Indonesia, 2007
UI - Skripsi (Membership)
Masripah
Universitas Indonesia, 2009
UI - Skripsi (Open)