Butler, J. J. Earth Observing Systems XXVII. SPIE Digital Library.
Cita Chicago (17th ed.)Butler, James J. Earth Observing Systems XXVII. SPIE Digital Library.
Cita MLA (9th ed.)Butler, James J. Earth Observing Systems XXVII. SPIE Digital Library.
Atenció: Aquestes cites poden no estar 100% correctes.