Gaya APA

Riskiyanto, ., Hidayat, A, N. (2025). New Insight OSN Geografi SMA/MA (Cet. 1). Jakarta: PT Gramedia Widiasarana Indonesia.

Gaya MLA

Riskiyanto, ., Hidayat, Arif, Nur. "New Insight OSN Geografi SMA/MA". Cet. 1 Jakarta: PT Gramedia Widiasarana Indonesia, 2025. Text.