Chiras, D. D. (2010). Natural resource conservation: Management for a sustainable future (10th ed.). Benjamin Cummings/Pearson.
Lua i Stíl Chicago (17ú heag.)Chiras, Daniel D. Natural Resource Conservation: Management for a Sustainable Future. 10th ed. Upper Saddle River, N.J: Benjamin Cummings/Pearson, 2010.
Lua MLA (9ú heag.)Chiras, Daniel D. Natural Resource Conservation: Management for a Sustainable Future. 10th ed. Benjamin Cummings/Pearson, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.