Villanueva-Almanza, L., & Fonseca, R. M. (2011). Taxonomic review and geographic distribution of Ephedra (Ephedraceae) in Mexico. Instituto de Ecología, A.C.
Čikaški stil citiranja (17. izdanje)Villanueva-Almanza, Lorena, i Rosa María Fonseca. Taxonomic Review and Geographic Distribution of Ephedra (Ephedraceae) in Mexico. Instituto de Ecología, A.C, 2011.
MLA način citiranja (9. izdanje)Villanueva-Almanza, Lorena, i Rosa María Fonseca. Taxonomic Review and Geographic Distribution of Ephedra (Ephedraceae) in Mexico. Instituto de Ecología, A.C, 2011.
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