Gaya APA
Wulan, D. (2016).
Whatever You Think, Think Positive Yuk, Praktekin ! (cet ke 1).
Yogyakarta:
Octopu Publishig House.
Gaya MLA
Wulan, Dhia.
"Whatever You Think, Think Positive Yuk, Praktekin !".
cet ke 1
Yogyakarta:
Octopu Publishig House,
2016.
Text.