prepared by 142 specialists ; Douglas M. Considine, editor-in-chief
McGraw-Hill, 1996
Buku Referensi
Meyers, Robert A., editor
John Wiley & Sons, 1983
Buku Referensi
edited by Douglas M. Considine
McGraw-Hill, 1977
Buku Teks
Loftness, Robert L., author
Van Nostrand Reinhold, 1984
Buku Referensi
edited by Mary H. Dickson, Mario Fanelli
Earthscan, 2003
Buku Teks