APA (7th ed.) Citation

(1931). Tidal current charts, Boston Harbor. Coast and Geodetic Survey.

Chicago Style (17th ed.) Citation

Tidal Current Charts, Boston Harbor. Washington, D.C: Coast and Geodetic Survey, 1931.

MLA (9th ed.) Citation

Tidal Current Charts, Boston Harbor. Coast and Geodetic Survey, 1931.

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