APA (7th ed.) Citation

Umbgrove, J. H. F., & Houten, J. L. v. (1947). The pulse of the earth. M. Nijhoff.

Chicago Style (17th ed.) Citation

Umbgrove, Johannes Herman Frederik, and J. L. van Houten. The Pulse of the Earth. The Hague: M. Nijhoff, 1947.

MLA (9th ed.) Citation

Umbgrove, Johannes Herman Frederik, and J. L. van Houten. The Pulse of the Earth. M. Nijhoff, 1947.