Leininger, Madeleine M., author
John Wiley & Sons, 1978
Buku Teks
edited by Mahlon Apgar
McGraw-Hill, 1976
Buku Teks
Hill, John W., author
Prentice-Hall, 1975
Buku Teks
edited by Robert K. Merton
Free Press, 1979
Buku Teks
Young, Kimball
Kegan Paul, Trench, Trubner, 1946
Buku Teks