Book Essentials, 1991
Buku Referensi
The Commercial Press, 1938
Buku Referensi
David B. Guralnik, editor in chief
Prentice-Hall, 1986
Buku Referensi
William Allan Neilson, editor in chief; Thomas A. Knott, general editor; Paul W. Carhart, managing editor
Springfield, G & C Merriam Co.
Buku Referensi
Houghton Miffin, 1991
Buku Referensi