Silverman, F.H. Authoring books and materials for students, academics, and professionals, 1998.

Encarta dict., via WWW, June 30, 2004 (authorship 1. writing as occupation: the practice or profession of writing books or other works; authoring: writing of computer programs: the creation of multimedia documents, for example, training packages or sales presentations, using special software geared to a nonprogrammer)

Merriam-Webster online dict., June 30, 2004 (authorship 1 : the profession of writing 2 : the source (as the author) of a piece of writing, music, or art 3 : the state or act of writing, creating, or causing)

Cambridge dictionaries online, June 30, 2004 (authoring : the design and creation of computer programs and websites: authoring tools/software, web authoring)