Villanueva-Almanza, L., & Fonseca, R. M. (2011). Taxonomic review and geographic distribution of Ephedra (Ephedraceae) in Mexico. Instituto de Ecología, A.C.
Citace podle Chicago (17th ed.)Villanueva-Almanza, Lorena, a Rosa María Fonseca. Taxonomic Review and Geographic Distribution of Ephedra (Ephedraceae) in Mexico. Instituto de Ecología, A.C, 2011.
Citace podle MLA (9th ed.)Villanueva-Almanza, Lorena, a Rosa María Fonseca. Taxonomic Review and Geographic Distribution of Ephedra (Ephedraceae) in Mexico. Instituto de Ecología, A.C, 2011.