Rif`atul Mahmudah, author
Fakultas Psikologi Universitas Indonesia, 2012
UI - Skripsi (Open)
Orford, Jim, author
John Wiley & Sons, 1992
Buku Teks
Walter, Eugene Victor, author
Chapel Hill, 1988
Buku Teks
Reardon, Kathleen Kelley
Beverly Hills, 1981
Buku Teks
Petri, Herbert L, author
Cengage Learning, 2013
Buku Teks