Soong, H. C. (2010). PDF digital watermarking grayscale photocopy detection of printed documents.
Chicago Style (17th ed.) CitationSoong, Hoong Cheng. PDF Digital Watermarking Grayscale Photocopy Detection of Printed Documents. 2010.
MLA (9th ed.) CitationSoong, Hoong Cheng. PDF Digital Watermarking Grayscale Photocopy Detection of Printed Documents. 2010.
Warning: These citations may not always be 100% accurate.