Trimmer, Joseph F.
Houghton Miffiln, 1983
Koleksi Publik
Ferguson, John Alexander
National Library of Australia, 1977
Buku Referensi
Grolier Incorporated, 1991
Buku Referensi
Grolier, 1994
Buku Referensi
Warren Thomas Reich, editor in chief
Simon & Schuster Macmillan, 1995
Buku Referensi