Heaton, G., Repetto, G., & Sobin, R. (1989). Transforming technology: An agenda for environmentally sustainable growth in the 21st century. World Resources Institute.
Παραπομπή σε μορφή Chicago (17η εκδ.)Heaton, George, George Repetto, και Rodney Sobin. Transforming Technology: An Agenda for Environmentally Sustainable Growth in the 21st Century. Washington, D.C., USA: World Resources Institute, 1989.
Παραπομπή σε μορφή MLA (9th εκδ.)Heaton, George, et al. Transforming Technology: An Agenda for Environmentally Sustainable Growth in the 21st Century. World Resources Institute, 1989.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.