Não informado. (2002). Ziff Davis Smart Business. Ziff Davis Media.
Chicagoスタイル(17版)引用形式Não informado. Ziff Davis Smart Business. San Francisco, Calif: Ziff Davis Media, 2002.
MLA(8版)引用形式Não informado. Ziff Davis Smart Business. Ziff Davis Media, 2002.
警告: この引用は必ずしも正確ではありません.