edited by Howard L. Parad and Roger R. Miller
Family Service Association of America, 1968
Buku Teks
Fischer, Joel, author
McGraw-Hill, 1978
Buku Teks
Raju Tanzil Aprizan, author
Fakultas Hukum Universitas Indonesia, 2013
UI - Skripsi (Membership)
Hamilton, Gordon, author
Uitgeverij Ploegsma, 1952
Buku Teks
edited by Robert W. Roberts, Robert H. Nee
University of Chicago Press, 1970
Buku Teks