Cita APA (7th ed.)
Ingalls, A. G. (1957). Amateur telescope making. Scientific American.
Cita Chicago (17th ed.)
Ingalls, Albert G. Amateur Telescope Making. Nueva York, EUA: Scientific American, 1957.
Cita MLA (9th ed.)
Ingalls, Albert G. Amateur Telescope Making. Scientific American, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.