Gaya APA
Dumont, T, Q. (2019).
The Power of Concentration : Kekuatan Konsentrasi (Cet. 1).
YOGYAKARTA:
BRIGHT PUBLISHER.
Gaya MLA
Dumont, Theron, Q.
"The Power of Concentration : Kekuatan Konsentrasi".
Cet. 1
YOGYAKARTA:
BRIGHT PUBLISHER,
2019.
Text.