Gaya APA

ASTM., . (1978). 1978 annual book of ASTM standard part 40. Electrical Insulation - Specifications : Solids, Liquids ang Gases; Test methods; liquids and gases; electrical protective equipment for worker (1978). : ASTM., Philadelphia.

Gaya MLA

ASTM., . "1978 annual book of ASTM standard part 40. Electrical Insulation - Specifications : Solids, Liquids ang Gases; Test methods; liquids and gases; electrical protective equipment for worker". 1978 : ASTM., Philadelphia, 1978. Text.