Koh. (2004). Click, click, who's there?: A family-based non-technical approach to help parents protect their children online. LHK Pub..
Lua i Stíl Chicago (17ú heag.)Koh. Click, Click, Who's There?: A Family-based Non-technical Approach to Help Parents Protect Their Children Online. Charlotte, NC: LHK Pub., 2004.
Lua MLA (9ú heag.)Koh. Click, Click, Who's There?: A Family-based Non-technical Approach to Help Parents Protect Their Children Online. LHK Pub., 2004.
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