APA (7th ed.) Citation

Callmann, R. (1950). The law of unfair competition and trade-marks (2nd ed.). Callaghan.

Chicago Style (17th ed.) Citation

Callmann, Rudolf. The Law of Unfair Competition and Trade-marks. 2nd ed. Chicago: Callaghan, 1950.

MLA (9th ed.) Citation

Callmann, Rudolf. The Law of Unfair Competition and Trade-marks. 2nd ed. Callaghan, 1950.