APA (7th ed.) Citation

United States. Hydrographic Office. (1931). Supplement to Hydrographic Office Publication No. 135, North Sea pilot: Corrections and additions from Notices to Mariners and other sources from date of publication (May 28, 1922) to Jan. 1, 1931. GPO.

Chicago Style (17th ed.) Citation

United States. Hydrographic Office. Supplement to Hydrographic Office Publication No. 135, North Sea Pilot: Corrections and Additions from Notices to Mariners and Other Sources from Date of Publication (May 28, 1922) to Jan. 1, 1931. [Washington]: GPO, 1931.

MLA (9th ed.) Citation

United States. Hydrographic Office. Supplement to Hydrographic Office Publication No. 135, North Sea Pilot: Corrections and Additions from Notices to Mariners and Other Sources from Date of Publication (May 28, 1922) to Jan. 1, 1931. GPO, 1931.