Porter, Burton Frederick
Harcourt Brace Jovanovich, 1974
Buku Teks
edited by R.S. Singh ... [et al.]
Oxford & IBH, 1988
Buku Teks
edited by Alexander Alberro,
MIT Press, 2000
Buku Teks
edited by Paul Taylor and A.J.R. Groom
Frances Pinter, 1978
Buku Teks
Narver, John C., author
Holt, Rinehart and Winston, 1971
Buku Teks