Gaya APA
Posi, T. (2021).
Science Competition Workbook IPS SMP/MTs .
Jakarta Selatan:
Lembaga Manajemen Terapan TRUSTCO.
Gaya MLA
Posi, Tim.
"Science Competition Workbook IPS SMP/MTs".
Jakarta Selatan:
Lembaga Manajemen Terapan TRUSTCO,
2021.
Art Original.