Não informado. Electrical developments. General Electric, National Lamp Works, Lamp Department.
Citação do estilo Chicago (17ª ed.)Não informado. Electrical Developments. New York: General Electric, National Lamp Works, Lamp Department.
Citação MLA (8ª ed.)Não informado. Electrical Developments. General Electric, National Lamp Works, Lamp Department.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.