Shurter, Robert L.
Handy grammar reference: a guide to better English / Robert L. Shurter
McGraw-Hill, 1959
 Buku Teks
Murphy, Raymond
English grammar in use : a reference and practice book for intermediate students / Raymond Murphy
Cambridge University Press, 1998
 Buku Teks
Hewings, Martin
Advanced grammar in use : a reference and practice book for advanced students of english
Cambridge University Press, 2005
 Buku Teks
Stone, Florence M.
The manager's question and answer book
[American Management Association, ], 2003
 eBooks
Minow, Mary
The library's legal answer book
[American Library association, American Library association], 2003
 eBooks