G. Brown, G., Kretzschmar, A., & C. Patrón, J. (2010). Modification of root density in pot experiments with two tropical earthworm species. Instituto de Ecología, A.C.
Chicago-viite (17. p.)G. Brown, George, André Kretzschmar, ja José C. Patrón. Modification of Root Density in Pot Experiments with Two Tropical Earthworm Species. Instituto de Ecología, A.C, 2010.
MLA-viite (9. p.)G. Brown, George, et al. Modification of Root Density in Pot Experiments with Two Tropical Earthworm Species. Instituto de Ecología, A.C, 2010.