Heldt, P. M. (1929). Motor vehicles and tractors: A textbook for students and a handbook for engineers. P. M. Heldt.
Chicago Style (17th ed.) CitationHeldt, Peter Martin. Motor Vehicles and Tractors: A Textbook for Students and a Handbook for Engineers. Nyack, N. Y.: P. M. Heldt, 1929.
MLA (9th ed.) CitationHeldt, Peter Martin. Motor Vehicles and Tractors: A Textbook for Students and a Handbook for Engineers. P. M. Heldt, 1929.
Warning: These citations may not always be 100% accurate.