APA Style

NABHAN, G, P. (1990). Wild phaseolus ecogeography in the Sierra Madre occidental, Mexico: areographic techniques for targeting and conserving species diversity . : IBPGR.

MLA Style

NABHAN, Gary, Paul. "Wild phaseolus ecogeography in the Sierra Madre occidental, Mexico: areographic techniques for targeting and conserving species diversity". : IBPGR, 1990. Electronic resources.