(1997). Letters. New York: Oxford University Press.
Trích dẫn kiểu ChicagoLetters. New York: Oxford University Press, 1997.
MLA CitationLetters. New York: Oxford University Press, 1997.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.
(1997). Letters. New York: Oxford University Press.
Trích dẫn kiểu ChicagoLetters. New York: Oxford University Press, 1997.
MLA CitationLetters. New York: Oxford University Press, 1997.