Tibbetts, J. (1998). Open space conservation: Investing in your community's economic health. Lincoln Inst. of Land Policy.
Chicago-Zitierstil (17. Ausg.)Tibbetts, John. Open Space Conservation: Investing in Your Community's Economic Health. Cambridge, Mass: Lincoln Inst. of Land Policy, 1998.
MLA-Zitierstil (9. Ausg.)Tibbetts, John. Open Space Conservation: Investing in Your Community's Economic Health. Lincoln Inst. of Land Policy, 1998.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.