Robinson, J. H. (1972). Astronomy data book. John Wiley and Sons.
Cita Chicago (17th ed.)Robinson, J. Hedley. Astronomy Data Book. John Wiley and Sons, 1972.
Cita MLA (9th ed.)Robinson, J. Hedley. Astronomy Data Book. John Wiley and Sons, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.