Gaya APA

co, C, T. (1959). D4 tractor 60 inch gauge parts catalog serial numbers 7U27570 UP (1959). : USA : Caterpillar Tractor Co.,.

Gaya MLA

co, Caterpillar, Tractor. "D4 tractor 60 inch gauge parts catalog serial numbers 7U27570 UP". 1959 : USA : Caterpillar Tractor Co.,, 1959. Text.