edited by Richard C. Vetter
Voice of America, 1974
Buku Teks
Guralnick, Peter
Little, Brown and Company, 1994
Buku Teks
Coleman, Verna
Melbourne University Press, Melbourne Univ. Press
Buku Teks
Bjerre, Jens
William Morroe, [date of publication not identified]
Buku Teks
Mosley, Leonard, author
Jaico Publishing House, 1966
Buku Teks