Hernandez, H. M., & Godinez A., H. (1994). Contribution to the knowledge of threatened Mexican cacti. Instituto de Ecología, A.C.
Chicago-čujuhus (17. p.)Hernandez, Hector M., juo Hector Godinez A. Contribution to the Knowledge of Threatened Mexican Cacti. Instituto de Ecología, A.C, 1994.
MLA-čujuhus (9. p.)Hernandez, Hector M., juo Hector Godinez A. Contribution to the Knowledge of Threatened Mexican Cacti. Instituto de Ecología, A.C, 1994.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.
