Não informado. (1963). Ionospheric predictions. U.S. Department of Commerce, National Bureau of Standards, Central Radio Propagation Laboratory.
Citação do estilo Chicago (17ª ed.)Não informado. Ionospheric Predictions. Washington: U.S. Department of Commerce, National Bureau of Standards, Central Radio Propagation Laboratory, 1963.
Citação MLA (8ª ed.)Não informado. Ionospheric Predictions. U.S. Department of Commerce, National Bureau of Standards, Central Radio Propagation Laboratory, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.