APA (7th ed.) Citation

Suranyi-Unger, T., & Seligman, E. R. A. (1931). Economics in the twentieth century: The history of its international development. Norton.

Chicago Style (17th ed.) Citation

Suranyi-Unger, Theo, and Edwin R. A. Seligman. Economics in the Twentieth Century: The History of Its International Development. N.Y.: Norton, 1931.

MLA (8th ed.) Citation

Suranyi-Unger, Theo, and Edwin R. A. Seligman. Economics in the Twentieth Century: The History of Its International Development. Norton, 1931.