Gaya APA
Limited, E, T., Pertama, W, W.
(2016).
Alam
.
Jakarta:
Widya Wiyata Pertama.
Gaya MLA
Limited, Educational, Technologies., Pertama, Widya, Wiyata.
"Alam".
Jakarta:
Widya Wiyata Pertama,
2016.
Buku.