McEntire, Madison. Big League Trivia; Facts, Figures, Oddities, and Coincidences from our National Pastime. Bloomington, Indiana: AuthorHouse. p. IXArchived 2023-10-18 at the Wayback Machine and 53Archived 2023-10-18 at the Wayback Machine. ISBN1-4259-1292-3. Retrieved 4 September 2015.
Steigerwald, John. "This Was Clemente's Grandest Slam"Archived 2016-03-05 at the Wayback Machine. The Indiana Gazette. July 23, 2006. Retrieved 4 September 2015. "On July 25, 1956, Roberto Clemente did something that may have been done only once in the history of baseball. And I was there to see it. "
Steigerwald, John. "This Was Clemente's Grandest Slam"Archived 2016-03-05 at the Wayback Machine. The Indiana Gazette. July 23, 2006. Retrieved 4 September 2015. "On July 25, 1956, Roberto Clemente did something that may have been done only once in the history of baseball. And I was there to see it. "
McEntire, Madison. Big League Trivia; Facts, Figures, Oddities, and Coincidences from our National Pastime. Bloomington, Indiana: AuthorHouse. p. IXArchived 2023-10-18 at the Wayback Machine and 53Archived 2023-10-18 at the Wayback Machine. ISBN1-4259-1292-3. Retrieved 4 September 2015.