APA (7th ed.) Citation

Heldt, P. M. (1944). High-speed combustion engines: Design: production: tests (12th ed. of The gasoline motor.). P. M. Heldt.

Chicago Style (17th ed.) Citation

Heldt, Peter Martin. High-speed Combustion Engines: Design: Production: Tests. 12th ed. of The gasoline motor. Nyack, N. Y.: P. M. Heldt, 1944.

MLA (9th ed.) Citation

Heldt, Peter Martin. High-speed Combustion Engines: Design: Production: Tests. 12th ed. of The gasoline motor. P. M. Heldt, 1944.