Hart, James D., author
Oxford University Press, 1986
Buku Referensi
Fielding, Mantle, 1865-1941, author
Apollo, 1983
Buku Referensi
Holt, Rinehart and Winston, 1966
Buku Referensi
edited by Jess Stein
Random House, 1961
Buku Referensi
Holt, Rinehard and Winston, Inc.
Holt, Rinehart and Winston,Inc, 1966
Buku Teks