APA

Wentworth C. K., . (1922). The shapes of beach pebbles. Washington: Government Printing Office.

Chicago

Wentworth Chester K, . 1922. The shapes of beach pebbles. Washington: Government Printing Office.

Harvard

Wentworth C. K., . (1922). The shapes of beach pebbles. Washington: Government Printing Office.

MLA

Wentworth Chester K, . The shapes of beach pebbles. Washington: Government Printing Office. 1922.