Villanueva-Almanza, L., & Fonseca, R. M. (2011). Taxonomic review and geographic distribution of Ephedra (Ephedraceae) in Mexico. Instituto de Ecología, A.C.
Style de citation Chicago (17e éd.)Villanueva-Almanza, Lorena, et Rosa María Fonseca. Taxonomic Review and Geographic Distribution of Ephedra (Ephedraceae) in Mexico. Instituto de Ecología, A.C, 2011.
Style de citation MLA (9e éd.)Villanueva-Almanza, Lorena, et Rosa María Fonseca. Taxonomic Review and Geographic Distribution of Ephedra (Ephedraceae) in Mexico. Instituto de Ecología, A.C, 2011.