Watkins, W. Targets and Backgrounds: Characterization and Representation V. SPIE Digital Library.
Citazione stile Chigago Style (17a edizione)Watkins, Wendell. Targets and Backgrounds: Characterization and Representation V. SPIE Digital Library.
Citatione MLA (9a ed.)Watkins, Wendell. Targets and Backgrounds: Characterization and Representation V. SPIE Digital Library.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.