Koh. (2004). Click, click, who's there?: A family-based non-technical approach to help parents protect their children online. LHK Pub..
Chicago-referens (17:e uppl.)Koh. Click, Click, Who's There?: A Family-based Non-technical Approach to Help Parents Protect Their Children Online. Charlotte, NC: LHK Pub., 2004.
MLA-referens (9:e uppl.)Koh. Click, Click, Who's There?: A Family-based Non-technical Approach to Help Parents Protect Their Children Online. LHK Pub., 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.