Gaya APA

ASTM, . (1990). ASTM D 4281 - 89 Standard test method for oil and grease (fluorocarbon extractable substances) by gravimetric determination . : ASTM.

Gaya MLA

ASTM, . "ASTM D 4281 - 89 Standard test method for oil and grease (fluorocarbon extractable substances) by gravimetric determination". : ASTM, 1990. Diorama.