Gaya APA
Djamawir, M. (1983).
16 tenses: positive, negative interrogative, negative intereogative .
Jakarta:
Pustaka Dian.
Gaya MLA
Djamawir, M.A.
"16 tenses: positive, negative interrogative, negative intereogative".
Jakarta:
Pustaka Dian,
1983.
Text.