APA (7th ed.) Citation

Humbert, F. L. (1968). Selection and wear of pebbles on gravel beaches.

Chicago Style (17th ed.) Citation

Humbert, Fekko Lucas. Selection and Wear of Pebbles on Gravel Beaches. [Groningen, 1968.

MLA (8th ed.) Citation

Humbert, Fekko Lucas. Selection and Wear of Pebbles on Gravel Beaches. 1968.