APA (7th ed.) Citation

Durand, W. F., & Lesley, E. P. (1920). Experimental research on air propellers, II (prepr. from 4. annual report.). NACA.

Chicago Style (17th ed.) Citation

Durand, William Frederick, and E. P. Lesley. Experimental Research on Air Propellers, II. prepr. from 4. annual report. Washington: NACA, 1920.

MLA (9th ed.) Citation

Durand, William Frederick, and E. P. Lesley. Experimental Research on Air Propellers, II. prepr. from 4. annual report. NACA, 1920.