Lorence, D. H. (1990). A phylogenetic list of the genera of Rubiaceae in Mexico. Instituto de Ecología, A.C.
Čikaški stil citiranja (17. izdanje)Lorence, David H. A Phylogenetic List of the Genera of Rubiaceae in Mexico. Instituto de Ecología, A.C, 1990.
MLA način citiranja (9. izdanje)Lorence, David H. A Phylogenetic List of the Genera of Rubiaceae in Mexico. Instituto de Ecología, A.C, 1990.
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