Departemen Kesehatan Indonesia
Departemen Kesehatan, 1972
Buku Teks
Rina
Fakultas Psikologi Universitas Indonesia, 2007
UI - Tesis Membership
Galvin, Kathleen M.
Scott, Foresman, 1982
Buku Teks SO
edited by Helen Corr and Lynn Jamieson
Macmillan, 1990
Buku Teks SO
edited by Sylvia Ann Hewlett, Alice S. Ilchman and John J. Sweeney
Ballinger, 1986
Buku Teks SO