APA (7th ed.) Citation

Smelser, D. P. (1919). Unemployment and American trade unions. Johns Hopkins Press.

Chicago Style (17th ed.) Citation

Smelser, David Paul. Unemployment and American Trade Unions. Baltimore: Johns Hopkins Press, 1919.

MLA (9th ed.) Citation

Smelser, David Paul. Unemployment and American Trade Unions. Johns Hopkins Press, 1919.