APA (7th ed.) Citation

Roper, W. C. (1931). The problem of pricing in a socialist state. Harvard university press.

Chicago Style (17th ed.) Citation

Roper, W. Crosby. The Problem of Pricing in a Socialist State. Cambridge, Mass.: Harvard university press, 1931.

MLA (9th ed.) Citation

Roper, W. Crosby. The Problem of Pricing in a Socialist State. Harvard university press, 1931.