Healy, Karen, author
Sage Publications, 2000
Buku Teks
Christopher, Elphis, author
Temple Smith, 1980
Buku Teks
Mass. Schenkman , 1972
Buku Teks
Moore, Wilbert E. (Wilbert Ellis), author
Prentice-Hall, 1963
Buku Teks
edited by Eva Etzioni-Halevy and Amitai Etzioni
Basic Books, 1964
Buku Teks