Citazione Stile APA (7a Edizione)

Freeman, H. M. (1995). Cleaner technologies and cleaner products for sustainable development. Springer-Verlag.

Citazione stile Chigago Style (17a edizione)

Freeman, Harry M. Cleaner Technologies and Cleaner Products for Sustainable Development. New York: Springer-Verlag, 1995.

Citatione MLA (9a ed.)

Freeman, Harry M. Cleaner Technologies and Cleaner Products for Sustainable Development. Springer-Verlag, 1995.