APA (7e ed.) Bronvermelding

Não informado. Philips Research Reports. Philips Gloeilampenfabrieken, Research Laboratory.

Chicago (17e ed.) Bronvermelding

Não informado. Philips Research Reports. Eindhoven, Holanda: Philips Gloeilampenfabrieken, Research Laboratory.

MLA (8e ed.) Bronvermelding

Não informado. Philips Research Reports. Philips Gloeilampenfabrieken, Research Laboratory.

Let op: Deze citaties zijn niet altijd 100% accuraat.