Spencer, Patricia Elizabeth, author
Oxford University Press, 2016
Buku Teks
Intan Irawati, author
Fakultas Psikologi Universitas Indonesia, 2012
UI - Skripsi (Open)
Gonzalez-Mena, Janet, author
McGraw-Hill, 2003
Buku Teks
Cohen, Nancy J., 1941-, author
Sage Publications, 2001
Buku Teks
Kyle, J.G.
Cambridge University Press , 1988
Buku Teks