Gaya APA
Kartawidjaja, O, Y. et al (2022).
Before It's Too Late: Festival Hari Buku SKC .
Jakarta:
Sekolah Kristen Calvin.
Gaya MLA
Kartawidjaja, Odelia, Yaphine. et al.
"Before It's Too Late: Festival Hari Buku SKC".
Jakarta:
Sekolah Kristen Calvin,
2022.
Karya Cetak.