Cooke, David C.
A Popular Library Eagle Book, 1955
Buku Teks
Lynch, Thomas F.
Pocatello, 1967
Buku Teks
Zikmund, Miroslav, author
Artia, 1963
Buku Teks
Eells, Elsie Spicer
Robert M. McBride & Company, 1931
Buku Teks
Driver, Harold E., author
University of Chicago Press, 1961
Buku Teks