Vibrans, H. (1997). Commented floristic listo f wild vascular plants in San Juan Quetzalcoapan, Tlaxcala, Mexico. Instituto de Ecología, A.C.
Čikaški stil citiranja (17. izdanje)Vibrans, Heike. Commented Floristic Listo F Wild Vascular Plants in San Juan Quetzalcoapan, Tlaxcala, Mexico. Instituto de Ecología, A.C, 1997.
MLA način citiranja (9. izdanje)Vibrans, Heike. Commented Floristic Listo F Wild Vascular Plants in San Juan Quetzalcoapan, Tlaxcala, Mexico. Instituto de Ecología, A.C, 1997.
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