Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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