Mouton, Jane S., author
Hague, 1968
Buku Teks
[T.t.] [t.p.] 1975
Buku Teks
Harcourt, Brace & World, 1970
Buku Teks
edited, Bridget Somekh, Cathy Lewin
Sage Publications , 2005
Buku Teks
Bartholomew, David J., author
John Wiley & Sons, 1981
Buku Teks