APA (7th ed.) Citation

Airlines War Training Institute, Washington, D.C, & Etchison, J. W. (1942). Hydraulic principles, prepared for aircraft flight and ground crews. Airlines War Training Institute.

Chicago Style (17th ed.) Citation

Airlines War Training Institute, Washington, D.C, and James Walter Etchison. Hydraulic Principles, Prepared for Aircraft Flight and Ground Crews. Washington, D.C.: Airlines War Training Institute, 1942.

MLA (9th ed.) Citation

Airlines War Training Institute, Washington, D.C, and James Walter Etchison. Hydraulic Principles, Prepared for Aircraft Flight and Ground Crews. Airlines War Training Institute, 1942.