Gaya APA

Ptak, R. (2021). Sailing near the Natuna Islands and West Kalimantan: Noteson the "Zheng He Map" and some Ming "Rutters". . : .

Gaya MLA

Ptak, Roderich. "Sailing near the Natuna Islands and West Kalimantan: Noteson the "Zheng He Map" and some Ming "Rutters". ". : , 2021. Majalah.