Spirkin, A.G.
[publisher not identified], [date of publication not identified]
Buku Teks
Diamond, A. S. (Arthur Sigismund)
Methuen , 1959
Buku Teks
Noriko Takada
Macmillan, 1995
Buku Teks
Frellesvig, Bjark
Cambridge University Press, 2010
Buku Teks
Chomsky, Noam
Praeger , 1986
Buku Teks