Encyclopedia of sociology; Volume 4
Edgar F. Borgatta, editor-in-chief, Marie L. Borgatta, managing editor
Macmillan, 1992
 Buku Referensi
Encyclopedia of sociology; Volume 2
Edgar F. Borgatta, editor-in-chief, Marie L. Borgatta, managing editor
Macmillan, 1992
 Buku Referensi
Encyclopedia of sociology; Volume 1
Edgar F. Borgatta, editor-in-chief, Marie L. Borgatta, managing editor
Macmillan, 1992
 Buku Referensi
Encyclopedia of knowledge : volume 3
Grolier Incorporated, 1991
 Buku Referensi
The Encyclopedia Americana : volume 3
Grolier, 1994
 Buku Referensi