Gregg Andrews (29 Nov 2017). "Iglesias, Santiago (22 February 1872–05 December 1939), labor organizer and Puerto Rico's territorial representative in Congress". American National Biography Online (بالإنجليزية). DOI:10.1093/ANB/9780198606697.ARTICLE.1500358. ISSN:1470-6229. QID:Q103863987.
Gregg Andrews (29 Nov 2017). "Iglesias, Santiago (22 February 1872–05 December 1939), labor organizer and Puerto Rico's territorial representative in Congress". American National Biography Online (بالإنجليزية). DOI:10.1093/ANB/9780198606697.ARTICLE.1500358. ISSN:1470-6229. QID:Q103863987.
Gregg Andrews (29 Nov 2017). "Iglesias, Santiago (22 February 1872–05 December 1939), labor organizer and Puerto Rico's territorial representative in Congress". American National Biography Online (بالإنجليزية). DOI:10.1093/ANB/9780198606697.ARTICLE.1500358. ISSN:1470-6229. QID:Q103863987.