Gaya APA
Wulan, D.
(2016).
Whatever You Think, Think Positive
(
Cet.1)
.
Yogyakarta:
Octopus Publishing House.
Gaya MLA
Wulan, Dhia.
"Whatever You Think, Think Positive".
Cet.1
Yogyakarta:
Octopus Publishing House,
2016.
.