APA citiranje

Sorgenfrei T. Theodor. (1961). International Geological Congress. Report of the Twenty- First Session. Norden Denmark. Finland. Iceland. Norway. Sweden 1960. Copenhagen, Det Berlingske Bogtrykkeri, 1961.

Chicago Style (17th ed.) Citation

Sorgenfrei T. Theodor. International Geological Congress. Report of the Twenty- First Session. Norden Denmark. Finland. Iceland. Norway. Sweden 1960. Copenhagen, Det Berlingske Bogtrykkeri, 1961, 1961.

MLA citiranje

Sorgenfrei T. Theodor. International Geological Congress. Report of the Twenty- First Session. Norden Denmark. Finland. Iceland. Norway. Sweden 1960. Copenhagen, Det Berlingske Bogtrykkeri, 1961, 1961.