Não informado. Philips Technische Rundschau. Philips Gloeilampenfabrieken.
Chicago Style (17th ed.) CitationNão informado. Philips Technische Rundschau. Eindhoven, Holanda: Philips Gloeilampenfabrieken.
MLA (8th ed.) CitationNão informado. Philips Technische Rundschau. Philips Gloeilampenfabrieken.
Warning: These citations may not always be 100% accurate.