Jeff Simmons (2012-11-12). "José M. Aybar"(PDF). Hispanic Outlook in Higher Education. p. 10. Archived from the original(PDF) on 2016-03-07. Retrieved 2012-12-05.
Jeff Simmons (2012-11-12). "José M. Aybar"(PDF). Hispanic Outlook in Higher Education. p. 10. Archived from the original(PDF) on 2016-03-07. Retrieved 2012-12-05.
The Guatemalan Agrarian Reform of 1952: An Abortive Challenge to US Intervention in 1954. Routledge. 10 April 2019. ISBN9780429726453. OCLC150427363 – via Worldcat.