Alfthan, T., & Gagliardi, R. (1995). Environmental training: Policy and practice for sustainable development. Oxford and IBH Publication.
Lua i Stíl Chicago (17ú heag.)Alfthan, Torkel, agus Raul Gagliardi. Environmental Training: Policy and Practice for Sustainable Development. New Delhi: Oxford and IBH Publication, 1995.
Lua MLA (9ú heag.)Alfthan, Torkel, agus Raul Gagliardi. Environmental Training: Policy and Practice for Sustainable Development. Oxford and IBH Publication, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.