Gaya APA
Indra, D., Ishartadi, A.
(2019).
The Secret Of Thinking Big
.
Yogyakarta:
Unicorn Publishing.
Gaya MLA
Indra, Dewi., Ishartadi, Arif.
"The Secret Of Thinking Big".
Yogyakarta:
Unicorn Publishing,
2019.
Text.