APA (7th ed.) Citation

Unold, W., & Requate, T. (2001). Pollution control by options trading. Economics letters, 73(3), .

Chicago Style (17th ed.) Citation

Unold, Wolfram, and Tilman Requate. "Pollution Control by Options Trading." Economics Letters 73, no. 3 (2001).

MLA (9th ed.) Citation

Unold, Wolfram, and Tilman Requate. "Pollution Control by Options Trading." Economics Letters, vol. 73, no. 3, 2001.