Stets, Jan E., author
Oxford University Press, 2016
eBooks
David F. Marks....[et al]
Sage, 2000
Buku Teks
Corbetta, Piergiorgio, author
Sage Publications , 2003
Buku Teks
Hefferon, Kate, author
McGraw-Hill, 2011
Buku Teks
edited by J.A. Kong
John Wiley & Sons, 1981
Buku Teks