Azar, Betty Schrampfer, 1941-
Understanding and using english grammer / Betty Schrampfer Azar
Longman, 2002
 Buku Teks
Makkink, H.J.
An English grammar
Nijgh and Van Ditmar, 1951
 Buku Teks SO
Litamahuputty, Betty
Ternate Malay : grammar and texts / Betty Litamahuputty
Lot, 2012
 Buku Teks SO
Newby, Michael
The structure of English : a handbook of English grammar
Cambridge University Press, 1988
 Buku Teks SO
Azar, Betty Schrampfer, 1941-
Basic english grammar
Prentice Hall Regents, 1995
 Buku Teks SO