Cita APA (7th ed.)
Forsgren, S. K. (1951). Some Calculations of ray paths in the ionosphere.
Cita Chicago (17th ed.)
Forsgren, Sven K.H. Some Calculations of Ray Paths in the Ionosphere. 1951.
Cita MLA (9th ed.)
Forsgren, Sven K.H. Some Calculations of Ray Paths in the Ionosphere. 1951.
Atenció: Aquestes cites poden no estar 100% correctes.