Watkins, W. Targets and Backgrounds VIII: Characterization and Representation. SPIE Digital Library.
Cita Chicago (17th ed.)Watkins, Wendell. Targets and Backgrounds VIII: Characterization and Representation. SPIE Digital Library.
Cita MLA (9th ed.)Watkins, Wendell. Targets and Backgrounds VIII: Characterization and Representation. SPIE Digital Library.
Atenció: Aquestes cites poden no estar 100% correctes.