Dunn, John A., 1949-
Modern Russian Grammar : a practical guide
Routledge, 2009
 Buku Teks SO
Dunn, John, 1940-
Modern Russian grammar : a practical guide
Routledge, 2009
 Buku Referensi
A Practical Guide to teaching Modern foregn langauges in the secondary School
Edited by Norbert Pachler; Ana Redondo
Routledge, 2007
 Buku Teks SO
Lewis, Norman
Dictionary of correct spelling : a handy reference guide
Harper & Row , 1962
 Buku Referensi
Shurter, Robert L.
Handy grammar reference: a guide to better English / Robert L. Shurter
McGraw-Hill, 1959
 Buku Teks SO