Moore, Kenneth D.
Random House , 1989
Buku Teks
edited by Heather Fry, Steve Ketteridge and Stephanie Marshall
Routledge, 2009
Buku Referensi
Gianti Amanda
Fakultas Psikologi Universitas Indonesia, 2021
UI - Tesis Membership
Harwell, Joan M.
Jossey-Bass, 2001
Buku Teks
Lemlech, Johanna Kasin
Harper & Row , 1979
Buku Teks