Hewings, Martin
Pronunciation practice activities : a resource book for teaching english pronunciation
Cambridge University Press , 2004
 Buku Teks SO
Woods, Geraldine
Basic English grammar for dummies
John Wiley & Sons, 2016
 Buku Teks
Kaplan, Jeffrey P.
English grammar : principles and facts
Prentice Hall International, 1995
 Buku Teks
Makkink, H.J.
An English grammar
Nijgh and Van Ditmar, 1951
 Buku Teks
Jespersen, Otto
System of grammar
George Allen and Unwin, 1933
 Buku Teks