Cita APA (7a ed.)

United States Naval Observatory. (1946). Total eclipse of the sun May 20, 1947. Government Printing Office.

Cita Chicago Style (17a ed.)

United States Naval Observatory. Total Eclipse of the Sun May 20, 1947. Washington: Government Printing Office, 1946.

Cita MLA (9a ed.)

United States Naval Observatory. Total Eclipse of the Sun May 20, 1947. Government Printing Office, 1946.