Westview Press, 1986
Buku Teks
Dimen-Schein, Muriel, author
McGraw-Hill, 1977
Buku Teks
Pelto, Pertti J, author
Cambridge University Press, 1978
eBooks
Hernandez-Campoy, Juan Manuel, author
Wiley Blackwell, 2016
Buku Teks
Hidayati, author
2013
UI - Tesis (Membership)