APA
Holtby K. L., Kerr W. A. & Hobbs J. E. (2007). International environmental liability and barriers to trade. Cheltenham: Edward Elgar.
Chicago
Holtby Kareen L, Kerr William A and Hobbs Jill E. 2007. International environmental liability and barriers to trade. Cheltenham: Edward Elgar.
Harvard
Holtby K. L., Kerr W. A. and Hobbs J. E. (2007). International environmental liability and barriers to trade. Cheltenham: Edward Elgar.
MLA
Holtby Kareen L, Kerr William A and Hobbs Jill E. International environmental liability and barriers to trade. Cheltenham: Edward Elgar. 2007.