APA (7e ed.) Bronvermelding

Não informado. (1944). Ionospheric data. U.S. Department of Commerce, National Bureau of Standards, Central Radio Propagation Laboratory.

Chicago (17e ed.) Bronvermelding

Não informado. Ionospheric Data. Washington: U.S. Department of Commerce, National Bureau of Standards, Central Radio Propagation Laboratory, 1944.

MLA (8e ed.) Bronvermelding

Não informado. Ionospheric Data. U.S. Department of Commerce, National Bureau of Standards, Central Radio Propagation Laboratory, 1944.

Let op: Deze citaties zijn niet altijd 100% accuraat.