APA

Vander Schaaf, D., Wilhere, G., Ferdana, Z., Popper, K., Schindel, M., Skidmore, P., Rolph, D., Lachetti, P., Kittel, G., Crawford, R., Pickering, D., & Christy, J. (2006). Pacific Northwest Coast ecoregional assessment. : The Nature Conservancy, Portland, Oregon.