(1975). Vol. 232, № 6; Scientific American. 1975.
Cita Chicago (17th ed.)Vol. 232, № 6; Scientific American. 1975, 1975.
Cita MLA (9th ed.)Vol. 232, № 6; Scientific American. 1975, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)