APA

U. S. Hydrographic office, . (1931). Position tables for aerial and surface navigation. Washington: U. S. Govt. print. off.

Chicago

U. S. Hydrographic office, . 1931. Position tables for aerial and surface navigation. Washington: U. S. Govt. print. off.

Harvard

U. S. Hydrographic office, . (1931). Position tables for aerial and surface navigation. Washington: U. S. Govt. print. off.

MLA

U. S. Hydrographic office, . Position tables for aerial and surface navigation. Washington: U. S. Govt. print. off. 1931.