Quirk, Randolph
English Language Book Society/Longman, 1989
Buku Teks
Sambrook, G.A.
Longmans, Green, 1947
Buku Teks
London Collier-Macmillan 1965,
Buku Teks
Greenbaum, Sidney
Longman , 1990
Buku Teks
Ron White...[et al.]
Cambridge University Press , 1991
Buku Teks