PDF Signer (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "PDF Signer" in English language version.

refsWebsite

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tuaw.com

Gibbs, Samuel (May 31, 2011). "TUAWs Daily Mac App: PDF Signer". TUAW. Retrieved 2011-05-31.

youtube.com

"How To Electronically Sign PDFs on Mac". hacksformac. 2011-05-30. Retrieved 2011-05-30.