APA (7th ed.) Citation

Koefoed, O. (1979). Geosounding principles. Elsevier.

Chicago Style (17th ed.) Citation

Koefoed, O. Geosounding Principles. Amsterdam: Elsevier, 1979.

MLA (9th ed.) Citation

Koefoed, O. Geosounding Principles. Elsevier, 1979.

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