Loflin, B., & Loflin, S. (2009). Texas Cacti: A Field Guide. Texas A&M University Press.
Cita Chicago Style (17a ed.)Loflin, Brian, y Shirley Loflin. Texas Cacti: A Field Guide. College Station: Texas A&M University Press, 2009.
Cita MLA (8a ed.)Loflin, Brian, y Shirley Loflin. Texas Cacti: A Field Guide. Texas A&M University Press, 2009.
Precaución: Estas citas no son 100% exactas.