Gaya APA
2017-10-20, ., 2017-02-21, .
().
425110515
(
Textbook)
.
300:
2017-02-21.
Gaya MLA
2017-10-20, ., 2017-02-21, .
"425110515".
Textbook
300:
2017-02-21,
.
362.178 2 JUN P.