Artikel Jurnal
Thomas, Frank N, author
Springer, 2013
Buku Teks
Kelly, George Alexander
Routledge in Association with the Centre for Personal Construct Psychology , 1991
Buku Teks
Nahm, Sheena
Maryland : Lexington Books, 2014
Buku Teks
Payne, Martin, author
Sage Publications, 2004
Buku Teks