"Querétaro - Pinal de Amoles". Enciclopedia de los Municipios de México (in Spanish). Mexico: Instituto Nacional para el Federalismo y el Desarrollo Municipal. 2005. Archived from the original on March 27, 2012. Retrieved April 4, 2011.
itq.edu.mx
"Unidad Pinal de Amoles" (in Spanish). Mexico: Instituto Tecnológico de Querétaro. Archived from the original on October 6, 2011. Retrieved April 4, 2011.
pinaldeamoles.gob.mx
"Mirador de Cuatro Palos" [Lookout point at Cuatro Palos] (in Spanish). Querétaro, Mexico: Municipality of Pinal de Amoles. Archived from the original on October 2, 2011. Retrieved April 4, 2011.
"Querétaro - Pinal de Amoles". Enciclopedia de los Municipios de México (in Spanish). Mexico: Instituto Nacional para el Federalismo y el Desarrollo Municipal. 2005. Archived from the original on March 27, 2012. Retrieved April 4, 2011.
"Unidad Pinal de Amoles" (in Spanish). Mexico: Instituto Tecnológico de Querétaro. Archived from the original on October 6, 2011. Retrieved April 4, 2011.
"Mirador de Cuatro Palos" [Lookout point at Cuatro Palos] (in Spanish). Querétaro, Mexico: Municipality of Pinal de Amoles. Archived from the original on October 2, 2011. Retrieved April 4, 2011.