Gaya APA
Purba, O, D.
(2019).
Daily routines to be a happy person
(
Cet. 1)
.
Yogyakarta:
LAKSANA.
Gaya MLA
Purba, Olivia, Dianina.
"Daily routines to be a happy person".
Cet. 1
Yogyakarta:
LAKSANA,
2019.
Text.