Παραπομπή σε μορφή APA (7η εκδ.)

Hughes, J. W. (2007). Environmental problem solving: A how-to guide. University of Vermont Press ; Published by University Press of New England.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hughes, Jeffrey W. Environmental Problem Solving: A How-to Guide. Burlington, VT : Hanover: University of Vermont Press ; Published by University Press of New England, 2007.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hughes, Jeffrey W. Environmental Problem Solving: A How-to Guide. University of Vermont Press ; Published by University Press of New England, 2007.