APA Citatie

Raistric, A. (1939). Nature and origin of coal and coal seams. The English University press.

Chicago Style citaat

Raistric, A. Nature and Origin of Coal and Coal Seams. LOndon: The English University press, 1939.

MLA citatie

Raistric, A. Nature and Origin of Coal and Coal Seams. The English University press, 1939.