Dyfyniad APA

Nielsen, J. (1993). Usability engineering. Academic Press. https://doi.org/10.1016/C2009-0-21512-1

Dyfyniad Arddull Chicago

Nielsen, Jakob. Usability Engineering. Boston: Academic Press, 1993. https://doi.org/10.1016/C2009-0-21512-1.

Dyfyniad MLA

Nielsen, Jakob. Usability Engineering. Academic Press, 1993. https://doi.org/10.1016/C2009-0-21512-1.

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