Narang, Agustin Teras, author
Pustaka Sinar Harapan, 2003
Buku Teks
Akmal Nasery Basral
Ufuk, 2006
Buku Teks
edited by Saxe Commins and Robert N. Linscott
Modern Pocket Library, 1947
Buku Teks
Buber, Martin
Beacon Press, 1955
Buku Teks
Knapp, B.J., author
George Allen and Unwin, 1982
Buku Teks