APA (7th ed.) Citation

Shepard, F. P. (1950). Longshore-bars and longshore-troughs. [publisher not identified].

Chicago Style (17th ed.) Citation

Shepard, Francis P. Longshore-bars and Longshore-troughs. [Place of publication not identified]: [publisher not identified], 1950.

MLA (9th ed.) Citation

Shepard, Francis P. Longshore-bars and Longshore-troughs. [publisher not identified], 1950.

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