Ries, John C.
John Hopkins Press , 1964
Buku Teks
Roehrig, Terence, 1955-, author
Lexington Books, 2006
Buku Teks
Boothby, William H, author
Cambridge University Press, 2018
eBooks
Mohammad Reiza, author
2012
UI - Tesis (Membership)
Hayes, Margaret Daly, author
Westview Press, 1984
Buku Teks