APA (7th ed.) Citation

Caterpillar. (1981). D4D tractor: Direct drive. Caterpillar.

Chicago Style (17th ed.) Citation

Caterpillar. D4D Tractor: Direct Drive. Sao Paulo: Caterpillar, 1981.

MLA (9th ed.) Citation

Caterpillar. D4D Tractor: Direct Drive. Caterpillar, 1981.

Warning: These citations may not always be 100% accurate.