United States. National Advisory Committee for Aeronautics. (1938). Wind-tunnel investigation of N. A. C. A. 23012 airfoil with slotted flap and 3 types of auxiliary flap. [s.n.].
Chicago Style (17th ed.) CitationUnited States. National Advisory Committee for Aeronautics. Wind-tunnel Investigation of N. A. C. A. 23012 Airfoil with Slotted Flap and 3 Types of Auxiliary Flap. [Washington]: [s.n.], 1938.
MLA (9th ed.) CitationUnited States. National Advisory Committee for Aeronautics. Wind-tunnel Investigation of N. A. C. A. 23012 Airfoil with Slotted Flap and 3 Types of Auxiliary Flap. [s.n.], 1938.
Warning: These citations may not always be 100% accurate.