Cita APA (7th ed.)

SERNA, M. A. E., Ferrari, A. R. L., Romero, J. C., & CHOLEWA, A. F. (2001). Two new species of Mexican Iridaceae.

Cita Chicago (17th ed.)

SERNA, MARIO ADOLFO ESPEJO, Ana Rosa López Ferrari, Jacqueline Ceja Romero, i ANITA F. CHOLEWA. Two New Species of Mexican Iridaceae. 2001.

Cita MLA (9th ed.)

SERNA, MARIO ADOLFO ESPEJO, et al. Two New Species of Mexican Iridaceae. 2001.