Altman, Dennis
An Anchor Press Book, 1986
Buku Teks
Pasachoff, Naomi, author
Behrman House, 1986
Buku Referensi
Howard, John R., author
J.B. Lippincott, 1974
Buku Teks
Gras, Gilbert Le, author
reuters, 2002
Buku Teks
Head, Sydney W., author
Houghton Miffiln, 1972
Buku Teks