Geographical distribution of Gray long-tongued bat
Mammals of Mexico. 2014. edited by Gerardo Ceballos, 	Baltimore : Johns Hopkins University Press, ISBN:9781421408439
A field guide to the mammals of Central America &amp; Southeast Mexico. 2nd ed.  2009. written &amp; illustrated by Fiona A. Reid. Oxford ; New York : Oxford University Press. ISBN:9780195343229
Cephas