Evans, M. Stanton
harcourt Brace Jovanovich,Inc., 1975
Buku Teks
Rossiter, Clinton, 1917-1970, author
Harcourt Brace, 1960
Buku Teks
Bailey, Stephen K., author
Henry Holt, 1957
Buku Teks
Decker, Jefferson, author
Oxford University Press, 2016
eBooks
edited by Theodore L. Becker and Vernon G. Murray
Oxford University Press, 1971
Buku Teks