Lehmann, Winfred P.
Holt, Rinehart and Winston, 1962
Buku Teks
Barber, Charles
Cambridge University Press, 1993
Buku Teks
Campbell, Lyle
Edinburgh University Press , 2013
Buku Teks
edited by Charles Jones
Longman, 1993
Buku Teks
edited by William M. Christie, Jr.
North-Holland Publishing, 1976
Buku Teks