Gaya APA

Zwierzycki, D, J. (1919). General Geological Map of the Netherlands East Indian Archipelago (Scale 1 : 1.000.000) Explanatory Note To Sheet Vii. (Tapanoeli, Sumatra'S East Coast, Sumatra-West Coast) . : .

Gaya MLA

Zwierzycki, Dr., J.. "General Geological Map of the Netherlands East Indian Archipelago (Scale 1 : 1.000.000) Explanatory Note To Sheet Vii. (Tapanoeli, Sumatra'S East Coast, Sumatra-West Coast)". : , 1919. Text.