APA (7th ed.) Citation

Spence, A., & Lean, D. (1961). Some low-speed problems of high-speed aircraft. North Atlantic Treaty Organization.

Chicago Style (17th ed.) Citation

Spence, Alec, and Dennis Lean. Some Low-speed Problems of High-speed Aircraft. Paris: North Atlantic Treaty Organization, 1961.

MLA (9th ed.) Citation

Spence, Alec, and Dennis Lean. Some Low-speed Problems of High-speed Aircraft. North Atlantic Treaty Organization, 1961.