Rafaeli, S. (1988) "Interactivity: From new media to communication, Sage Annual Review of Communication Research: Advancing Communication Science Vol. 16 p. 110-134, Sage: Beverly Hills, CA.

Here is a large pdf file with the entire chapter
And here is a somewhat "cleaner" version

THese are individual photocopies of the pages:

Pages 110-111
Pages 112-113
Pages 114-115
Pages 117-117
Pages 118-119
Pages 120-121
Pages 122-123
Pages 124-125
Pages 126-127
Pages 128-129
Pages 130-131
Pages 132-133
Pages 134-135