APA (7th ed.) Citation

ProQuest (Firm). (1967). Automotive air pollution. [publisher not identified].

Chicago Style (17th ed.) Citation

ProQuest (Firm). Automotive Air Pollution. Washington: [publisher not identified], 1967.

MLA (9th ed.) Citation

ProQuest (Firm). Automotive Air Pollution. [publisher not identified], 1967.

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