Eissler, K. R.
International Universities Press, 1955
Buku Teks
Benton, Richard G., author
Van Nostrand Reinhold, 1978
Buku Teks
Kubler-Ross, Elisabeth, author
Macmillan, 1981
Buku Teks
Olavina Nurintan, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2004
UI - Skripsi (Membership)
Paver, Michelle, author
Matahari, 2006
Buku Teks