edited by Howard Nemerov
Voice of America Forum Lectures, 1973
Buku Teks
Jones, Joseph, author
University of Queensland Press, 1976
Buku Teks
Charles E. May, editor
Salem Press, 2011
Buku Teks
edited by James A. Levernier and Douglas R. Wilmes
Greenwood Press, 1983
Buku Referensi
Thornton, Thomas Perry
Princeton University Press , 1964
Buku Teks