Pérez Verdín, G., Lee, M. E., & Chavez, D. J. (2016). Planning forest recreation in natural protected areas of southern Durango, Mexico. Instituto de Ecología, A.C.
Lua i Stíl Chicago (17ú heag.)Pérez Verdín, Gustavo, Martha E. Lee, agus Deborah J. Chavez. Planning Forest Recreation in Natural Protected Areas of Southern Durango, Mexico. Instituto de Ecología, A.C, 2016.
Lua MLA (9ú heag.)Pérez Verdín, Gustavo, et al. Planning Forest Recreation in Natural Protected Areas of Southern Durango, Mexico. Instituto de Ecología, A.C, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
