Gaya APA

Riskiyanto, ., Hidayat, A, N. (2025). New Insight: Olimpiade Sains Nasional (OSN) Geografi SMA/MA . Jakarta: PT Gramedia Widiasarana Indonesia.

Gaya MLA

Riskiyanto, ., Hidayat, Arif, Nur. "New Insight: Olimpiade Sains Nasional (OSN) Geografi SMA/MA". Jakarta: PT Gramedia Widiasarana Indonesia, 2025. Text.