APA

Margoluis R., Myers S., Allen J. & Roca J. (2001). An ounce of prevention. Washington, District of Columbia, United States: World Wildlife Fund.

Chicago

Margoluis Richard, Myers Samuel, Allen Jonnell and Roca Juanita. 2001. An ounce of prevention. Washington, District of Columbia, United States: World Wildlife Fund.

Harvard

Margoluis R., Myers S., Allen J. and Roca J. (2001). An ounce of prevention. Washington, District of Columbia, United States: World Wildlife Fund.

MLA

Margoluis Richard, Myers Samuel, Allen Jonnell and Roca Juanita. An ounce of prevention. Washington, District of Columbia, United States: World Wildlife Fund. 2001.