Jackson, Patrick Thaddeus, 1972-, author
Routledge, 2016
Buku Teks
Kegley, Charles W. (Charles William), Jr., author
St. Martin's Press, 1995
Buku Teks
Kegley, Charles W. (Charles William), Jr., author
St. Martin's Press , 1995
Buku Teks
edited by Beth A. Simmons and Richard H. Steinberg
Cambridge University Press, 2006
Buku Teks
Moon, Parker Thomas, author
Macmillan, 1926
Buku Referensi