APA (7th ed.) Citation

Heller, H. (1982). Propeller aircraft noise-certification and flight-testing. DFVLR.

Chicago Style (17th ed.) Citation

Heller, H. Propeller Aircraft Noise-certification and Flight-testing. Köln: DFVLR, 1982.

MLA (8th ed.) Citation

Heller, H. Propeller Aircraft Noise-certification and Flight-testing. DFVLR, 1982.

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