Wiarda, Howard J., author
Wardword, 1995
Buku Teks
Hidayat Mukmin, author
Ghalia Indonesia, 1981
Buku Teks
edited by Fredrick B. Pike
University of Notre Dame Press, 1959
Buku Teks
Pía Riggirozzi
Springer, 2012
eBooks
edited by James Petras
John Wiley & Sons, 1973
Buku Teks