APA (7th ed.) Citation

Gull, C. D., Smith, C. L., Wooldridge, E. T., & Collins, M. J. (1989). A directory of sources for air and space history: Primary historical collections in United States repositories (A prelim. edition.). National Air and Space Museum, Smithsonian Institution.

Chicago Style (17th ed.) Citation

Gull, Cloyd Dake, Charles Louis Smith, E. T. Wooldridge, and Martin J. Collins. A Directory of Sources for Air and Space History: Primary Historical Collections in United States Repositories. A prelim. edition. Washington, D.C.: National Air and Space Museum, Smithsonian Institution, 1989.

MLA (9th ed.) Citation

Gull, Cloyd Dake, et al. A Directory of Sources for Air and Space History: Primary Historical Collections in United States Repositories. A prelim. edition. National Air and Space Museum, Smithsonian Institution, 1989.