Gaya APA

Beekhuis, C. (1962). Earth-Cataclysms (a theory of drift and a historic review of the geological adventures of our earth's surface) . Den Haag, Netherlands: N.V. Drukkerij Levisson.

Gaya MLA

Beekhuis, C.. "Earth-Cataclysms (a theory of drift and a historic review of the geological adventures of our earth's surface)". Den Haag, Netherlands: N.V. Drukkerij Levisson, 1962. Academic.