APA (7th ed.) Citation

Umbgrove, J. H. F. (1971). The Pulse of the Earth (2 nd. edition.). Martinus mijhoff.

Chicago Style (17th ed.) Citation

Umbgrove, J. H. F. The Pulse of the Earth. 2 nd. edition. Hague: Martinus mijhoff, 1971.

MLA (9th ed.) Citation

Umbgrove, J. H. F. The Pulse of the Earth. 2 nd. edition. Martinus mijhoff, 1971.

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