Palmer, Joel
Ann Arbor University Microfilms 1966
Buku Teks
Walker, Von Bryce S
Die Wildnisse Der welt, 1973
Buku Teks
O`Connor, Mark
Megalong Book, 1988
Buku Teks
Hosseini, Khaled
Penguin Books, 2013
Buku Teks
Llewellyn, Kate
Globe Press, 1990
Buku Teks