Dyfyniad APA

(1991). Toolworks Reference Library. The Software Toolworks.

Dyfyniad Arddull Chicago

Toolworks Reference Library. Novato, CA: The Software Toolworks, 1991.

Dyfyniad MLA

Toolworks Reference Library. The Software Toolworks, 1991.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.