Wikipedia: Ida Tarbell
- Brief encyclopedia article with hyperlinks to related topics.
- http://en.wikipedia.org/wiki/Ida_Tarbell

New York Times: Obituary
- Tarbell died at age 86 on January 16, 1944.
- http://www.nytimes.com/learning/general/onthisday/bday/1105.html

Ida Tarbell Papers, 1896-1943
- Finding aid for Tarbell's papers in the collections of Smith College, including biographical material, correspondence and writings.
- http://asteria.fivecolleges.edu/findaids/sophiasmith/mnsss114.html

Ida M. Tarbell
- Brief account of an interview with Tarbell, which appeared in The Bookman magazine, January 1903. From the University of Virginia Library, Electronic Text Center Website.
- http://etext.lib.virginia.edu/toc/modeng/public/AnoTarb.html

American Experience: The Rockefellers: Ida Tarbell
- Brief biography of US journalist Ida Tarbell (1857-1944) from the Web site of the PBS television series. Tarbell wrote a classic expose of Rockefeller and his Standard Oil Company.
- http://www.pbs.org/wgbh/amex/rockefellers/peopleevents/p_tarbell.html