APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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