Alumbaugh, R. L., Humm, E. F., & Keeton, J. R. (1990). Investigation of spray-applied polyurethane foam roofing systems-II. Naval Civil Engineering Laboratory.
Chicago Style (17th ed.) CitationAlumbaugh, R. L., E. F. Humm, and John R. Keeton. Investigation of Spray-applied Polyurethane Foam Roofing Systems-II. Port Hueneme, Calif.: Naval Civil Engineering Laboratory, 1990.
MLA (9th ed.) CitationAlumbaugh, R. L., et al. Investigation of Spray-applied Polyurethane Foam Roofing Systems-II. Naval Civil Engineering Laboratory, 1990.
Warning: These citations may not always be 100% accurate.