APA (7th ed.) Citation

Geysels, J., Mertens, J., & Heughebaert, M. (2001). Groen over Grenzen. Brussel: Oikos.

Chicago Style (17th ed.) Citation

Geysels, Jos, Jan Mertens, and Marc Heughebaert. Groen over Grenzen. Brussel: Oikos, 2001.

MLA (8th ed.) Citation

Geysels, Jos, et al. Groen over Grenzen. Brussel: Oikos, 2001.