edited by Roman Kolkowicz and Neil Joeck
Westview Press, 1984
Buku Teks
Robin, Ranger, author
Gage, 1979
Buku Teks
Edward, David V., author
Holt, Rinehart and Winston, 1969
Buku Teks
edited by Edward McWhinney [and others]
Martinus Nijhoff Publishers, 1991
Buku Teks
Pudji Astuti, author
Program Pascasarjana Universitas Indonesia, 2011
UI - Tesis Open