Murray, Neil
Standards of english in higher education: issues, challenges and strategies
Cambridge University Press, 2015
 eBooks
Makkink, H.J.
An English grammar
Nijgh and Van Ditmar, 1951
 Buku Teks SO
Kale, M.R.
A higher sanskrit grammar
Motilal banarsidass publishers private limited, 1992
 Buku Referensi
Analisis standar isis bahasa inggeris SMP dan SMA (analysis of contect standards for english in junior secondary school and senior secondary school)
 Artikel Jurnal
Newby, Michael
The structure of English : a handbook of English grammar
Cambridge University Press, 1988
 Buku Teks SO