Dyfyniad APA

Tatnall, A. (2004). Web portals: The new gateways to internet information and services. Hersley, PA: IGP.

Dyfyniad Arddull Chicago

Tatnall, Arthur. Web Portals: The New Gateways to Internet Information and Services. Hersley, PA: IGP, 2004.

Dyfyniad MLA

Tatnall, Arthur. Web Portals: The New Gateways to Internet Information and Services. Hersley, PA: IGP, 2004.

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