Beatty, Charles
Harper & Brothers Publishers, 1956
Buku Teks
Vintage Books, 1956
Buku Teks
Friede, Juan
Northern Illinois University Press, 1971
Buku Teks
Saussure, Ferdinand de, author
Geneve Georg & Cie, S.A., Corraterie 1946
Buku Teks
Holdcroft, David, author
Cambridge University Press, 1991
Buku Teks