edited by John T. Gillespie, Corinne J. Naden
R.R. Bowker, 1990
Buku Referensi
edited by Holly Koelling
American Library association, 2007
eBooks
Starrett, Vincent, author
Bantam Books, 1955
Koleksi Publik
R.R. Bowker, 1991
Buku Teks
Reader's Digest Association , 1962
Buku Teks