APA (7th ed.) Citation

Helle, J. R. (1958). Surf statistics for the coasts of the United States. U.S. Beach Erosion Board.

Chicago Style (17th ed.) Citation

Helle, James R. Surf Statistics for the Coasts of the United States. [Washington]: U.S. Beach Erosion Board, 1958.

MLA (9th ed.) Citation

Helle, James R. Surf Statistics for the Coasts of the United States. U.S. Beach Erosion Board, 1958.

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