APA (7th ed.) Citation

Litchfield, P. W., & Allen, H. (1976). Why?: Why has America no rigid airships? : a study of the characteristics of large ocean-crossing rigid airships, leading up to the question, Why does not America use all three, the dirigible, the airplane and the steamship, to provide this country with the best possible transportation system? 7 C's Press.

Chicago Style (17th ed.) Citation

Litchfield, P. W., and Hugh Allen. Why?: Why Has America No Rigid Airships? : A Study of the Characteristics of Large Ocean-crossing Rigid Airships, Leading Up to the Question, Why Does Not America Use All Three, the Dirigible, the Airplane and the Steamship, to Provide This Country with the Best Possible Transportation System? Riverside, CT: 7 C's Press, 1976.

MLA (9th ed.) Citation

Litchfield, P. W., and Hugh Allen. Why?: Why Has America No Rigid Airships? : A Study of the Characteristics of Large Ocean-crossing Rigid Airships, Leading Up to the Question, Why Does Not America Use All Three, the Dirigible, the Airplane and the Steamship, to Provide This Country with the Best Possible Transportation System? 7 C's Press, 1976.