Gaya APA
Dixson, R, J. (1972).
Tests and Drills in English Grammmar (Book 1) (Revised Edition).
USA:
Regent Publishing Company.
Gaya MLA
Dixson, Robert, J..
"Tests and Drills in English Grammmar (Book 1)".
Revised Edition
USA:
Regent Publishing Company,
1972.
Teksbook.