Dyfyniad APA

Philips. (1981). PTI in brief. Nertherlands: Philips' Telecommunicatie Industrie BV.

Dyfyniad Arddull Chicago

Philips. PTI in Brief. Nertherlands: Philips' Telecommunicatie Industrie BV, 1981.

Dyfyniad MLA

Philips. PTI in Brief. Nertherlands: Philips' Telecommunicatie Industrie BV, 1981.

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