Gaya APA

ASTM, . (1969). 1969 Book of ASTM standard Part 3 Steel sheet, strip, bar, rod, wire, chain and spring, wrought iron bar and (1969). : Easton : ASTM,.

Gaya MLA

ASTM, . "1969 Book of ASTM standard Part 3 Steel sheet, strip, bar, rod, wire, chain and spring, wrought iron bar and". 1969 : Easton : ASTM,, 1969. Text.