Bridgwater, A. V., & Mumford, C. J. (1979). Waste recycling and pollution control handbook. Van Nostrand Reinhold.
Lua i Stíl Chicago (17ú heag.)Bridgwater, A. V., agus C. J. Mumford. Waste Recycling and Pollution Control Handbook. New York: Van Nostrand Reinhold, 1979.
Lua MLA (9ú heag.)Bridgwater, A. V., agus C. J. Mumford. Waste Recycling and Pollution Control Handbook. Van Nostrand Reinhold, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.