APA
Willis Kenneth G Ed, Button Kenneth Ed & Nijkamp Peter Ed. (1999). Environmental valuation. Cheltenham: Elgar Reference Collection.
Chicago
Willis Kenneth G Ed, Button Kenneth Ed and Nijkamp Peter Ed. 1999. Environmental valuation. Cheltenham: Elgar Reference Collection.
Harvard
Willis Kenneth G Ed, Button Kenneth Ed and Nijkamp Peter Ed. (1999). Environmental valuation. Cheltenham: Elgar Reference Collection.
MLA
Willis Kenneth G Ed, Button Kenneth Ed and Nijkamp Peter Ed. Environmental valuation. Cheltenham: Elgar Reference Collection. 1999.
