Knutson, Andie L., author
Russell Sage Foundation, 1971
Buku Teks
Lazarus, Arnold A.
McGraw-Hill, 1971
Buku Teks
Hernanda Anindita, author
Fakultas Psikologi Universitas Indonesia, 2008
UI - Tesis (Membership)
Combs, Arthur W., author
Harper & Row, Publishers., 1959
Buku Teks
Dennis, Lorraine Bradt, author
WB. Saunders, 1967
Buku Teks