As associate historian in the Senate Historical Office, beginning in 1976, Ritchie conductedoral history interviews with former senators and retired members of Senate staff as part of the Senate oral history project.[3] In 2009 he became the Senate historian, succeedingRichard Baker, and held that post until his retirement in 2015.[4]
The Columnist: Leaks, Lies, and Libel in Drew Pearson's Washington. Oxford University Press. 2021.
Washington's Iron Butterfly: Bess Clements Abell, an Oral History, with Terry L. Birdwhistell. University Press of Kentucky. 2022.
Textbooks:
United States History and Geography,The American Vision,The American Republic, andThe American Journey, with Joyce Appleby, Alan Brinkley, Albert Broussard, and James McPherson (Glencoe/McGraw-Hill)
United States Government, with Richard C. Remy, Lena Morreale Scott, and Megan L. Hanson (McGraw-Hill).
^"Donald A. Ritchie" (2011).Almanac of the Unelected: Staff of the U.S. Congress. 23rd ed. Suzanne Struglinski and Lisa Friedman (eds.). Lanham, MD: Bernan Press. p. 29.
^U. S. National Archives and Records Administration (undated). "Senate Oral History Program," section "About the Interviewer: Donald A. Ritchie." Retrieved 2015-03-28.
^Ritchie, Donald A. (August 2003). "Releasing Joe McCarthy."Organization of American Historians (OAH) Newsletter,vol. 31, no. 3. p. 1, 6. Retrieved 2015-03-28.
^abWilson Center (2010). "Why a Congress and Not a Parliament" [posting about event on September 13, 2010], section "Donald A. Ritchie" [speaker biography]. Retrieved 2015-03-28.
^"Donald A. Ritchie" (2006) [contributor biography]. In Barry A. Lanman and Laura M. Wendling (eds.),Preparing the Next Generation of Oral Historians: An Anthology of Oral History Education. Lanham, MD: AltaMira Press. p. 480.