edited by Ann Bowling, Shah Ebrahim
Open University Press, 2007
Buku Teks
Di Iorio, Colleen Konicki, 1947-, author
Jossey-Bass, 2005
Buku Teks
Krick, Edward V.
John Wiley & Sons, 1962
Buku Teks
Kaplan, Seymour, author
McGraw-Hill, 1983
Buku Teks
Green, Roger H., author
John Wiley & Sons, 1979
Buku Teks