Berlin, Normand
Macmillan Education, 1988
Buku Teks SO
O`neill, Eugene
Penguin Books, 1970
Buku Teks SO
Ramayanti Budi Santoso
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 1985
UI - Skripsi Membership
Leila Djafaar
1985
UI - Skripsi Membership
O`neill, Eugene
Yayasan Obor Indonesia, 1991
Buku Teks SO