Cookies and Web Bugs: What They are and How They Work Together. - William T. Harding; Anita J. Reed; Robert L. Gray (Inf. Syst. Manag., 2001)

Cookies and Web Bugs. - William T. Harding; Anita J. Reed; Robert L. Gray (Information Security Management Handbook, 6th ed., 2007)

Cookies and Web Bugs. - William T. Harding; Anita J. Reed; Robert L. Gray (Encyclopedia of Information Assurance, 2011)