Hogins, J. Burl
Harper & Row, 1969
Buku Teks SO
edited by Duddley Bailey
W.W. Norton, 1965
Buku Teks SO
St. Martin's press, 1981
Buku Teks SO
Bloomfield, Leonard
Holt, Rinehart and Winston, 1961
Buku Teks SO
editor, Tom McArthur ; managing editor, Feri McArthur
Oxford University Press, 1992
Buku Referensi