APA (7e ed.) Bronvermelding

Hassell, S., Clancy, N., Burger, N., Nelson, C., & Rudavsky, R. (2010). An Assessment of the U.S. Environmental Protection Agency's National Environmental Performance Track Program. RAND Corporation.

Chicago (17e ed.) Bronvermelding

Hassell, Scott, Noreen Clancy, Nicholas Burger, Christopher Nelson, en Rena Rudavsky. An Assessment of the U.S. Environmental Protection Agency's National Environmental Performance Track Program. RAND Corporation, 2010.

MLA (9e ed.) Bronvermelding

Hassell, Scott, et al. An Assessment of the U.S. Environmental Protection Agency's National Environmental Performance Track Program. RAND Corporation, 2010.