Watkins, W. Targets and Backgrounds: Characterization and Representation III. SPIE Digital Library.
芝加哥风格引文Watkins, Wendell. Targets and Backgrounds: Characterization and Representation III. SPIE Digital Library.
MLA引文Watkins, Wendell. Targets and Backgrounds: Characterization and Representation III. SPIE Digital Library.
警告：这些引文格式不一定是100％准确.