Dyfyniad APA

Skidmore, S. (1990). Introducing systems design (2th .ed.). NCC Blackwell.

Dyfyniad Arddull Chicago

Skidmore, Steve. Introducing Systems Design. 2th .ed. Manchester: NCC Blackwell, 1990.

Dyfyniad MLA

Skidmore, Steve. Introducing Systems Design. 2th .ed. NCC Blackwell, 1990.

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