John Wiley & Sons, 1987
Buku Referensi
John Wiley & Sons, 1987
Buku Referensi
Grolier Incorporated, 1991
Buku Referensi
Warren Thomas Reich, editor in chief
Simon & Schuster Macmillan, 1995
Buku Referensi
Edgar F. Borgatta, editor-in-chief, Marie L. Borgatta, managing editor
Macmillan, 1992
Buku Referensi