Edwards, Allen L.
Appleton Century Crofts, 1957
Buku Teks
Maio, Gregory R.
Sage, 2015
Buku Teks
Kershaw Publ., 1977
Buku Teks
Ibadurrahman
Fakultas Psikologi Universitas Indonesia, 2013
UI - Skripsi (Membership)
Cohen, Arthur R.
Basic Books, 1964
Buku Teks