APA (7th ed.) Citation

Berthelsen, A. (1961). On the chronology of the precambrian of Western Greenland.

Chicago Style (17th ed.) Citation

Berthelsen, Asger. On the Chronology of the Precambrian of Western Greenland. Koppenhagen, 1961.

MLA (9th ed.) Citation

Berthelsen, Asger. On the Chronology of the Precambrian of Western Greenland. 1961.

Warning: These citations may not always be 100% accurate.