Gaya APA
Djamawir, . ().
16 Tenses: Positive, Negative, Interrogative, Negative Interrogative (Cet. 2).
Jakarta:
Pustaka Dian.
Gaya MLA
Djamawir, .
"16 Tenses: Positive, Negative, Interrogative, Negative Interrogative".
Cet. 2
Jakarta:
Pustaka Dian,
.
Text.