APA (7th ed.) Citation

Siebert, H., Walter, I., & Zimmermann, K. (1980). Regional environmental policy: The economic issues. MacMillan.

Chicago Style (17th ed.) Citation

Siebert, Horst, Ingo Walter, and Klaus Zimmermann. Regional Environmental Policy: The Economic Issues. London [etc.]: MacMillan, 1980.

MLA (9th ed.) Citation

Siebert, Horst, et al. Regional Environmental Policy: The Economic Issues. MacMillan, 1980.

Warning: These citations may not always be 100% accurate.