APA   Click to copy
Clapp, J., & Swanston, L. (2009). Doing away with plastic shopping bags: international patterns of norm emergence and policy implementation.

Chicago/Turabian   Click to copy
Clapp, J., and L. Swanston. “Doing Away with Plastic Shopping Bags: International Patterns of Norm Emergence and Policy Implementation” (2009).

MLA   Click to copy
Clapp, J., and L. Swanston. Doing Away with Plastic Shopping Bags: International Patterns of Norm Emergence and Policy Implementation. 2009.

@article{j2009a,
  title = {Doing away with plastic shopping bags: international patterns of norm emergence and policy implementation},
  year = {2009},
  author = {Clapp, J. and Swanston, L.}
}