edited by Henry Steele Commager
Appleton-Century-Crofts, 1949
Buku Referensi
W. H. Freeman,, 1971
Buku Teks
Barnett, A. Doak (Arthur Doak), author
Princeton University Press, 1967
Buku Teks
by George A. Bermann ... [et al.]
West Pub. Co., 1993
Buku Teks
edited by Frank O. Colby
Thomas Y. Crowell, 1950
Buku Referensi