Gaya APA
Napa, P, A. (2000).
Basic English Grammar With Clear Explanation, Examples, And Exercises (Cet. 10).
Yogyakarta:
Kanisius.
Gaya MLA
Napa, Pieter, A..
"Basic English Grammar With Clear Explanation, Examples, And Exercises".
Cet. 10
Yogyakarta:
Kanisius,
2000.
Text.