edited, with introduction by Goran Schildt
Rizzol, 1998
Buku Teks
Nickel, James W.
Blackwell , 2007
Buku Teks
Williams, Malcolm, 1953-
Sage , 2003
Buku Teks SO
edited by Hans F. Crombag and Dato N. De Gruijter
Mouton, 1974
Buku Teks
Kunda, Ziva
MIT Press, 1999
Buku Teks