Pujol, R., & Solano, E. (2011). SOLID WASTE RECYCLIN IN COSTA RICA: BALANCE AND PERSPECTIVES. Universidad de Costa Rica.
Chicago-čujuhus (17. p.)Pujol, Rosendo, juo Eric Solano. SOLID WASTE RECYCLIN IN COSTA RICA: BALANCE AND PERSPECTIVES. Universidad de Costa Rica, 2011.
MLA-čujuhus (9. p.)Pujol, Rosendo, juo Eric Solano. SOLID WASTE RECYCLIN IN COSTA RICA: BALANCE AND PERSPECTIVES. Universidad de Costa Rica, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.