Timeline: Sammy Sosa vs. Mark McGwire in 1998
The McGwire-Sosa home run chase helped make 1998 one of MLB's wildest seasons ever - ESPN
Remembering the 1998 home run race - Royals Review
Chicago White Sox: Frank Thomas was better than Sosa and McGwire
The 20 greatest home runs in Cubs history, No. 15: Sammy Sosa, September 13, 1998 - Bleed Cubbie Blue
Mark Mcgwire And Sammy Sosa The Great Home Run Race Sports Illustrated Cover by Sports Illustrated
Looking Back At The 1998 Home Run Chase – Hartford Courant
Vintage Mark Mcgwire and Sammy Sosa Home Run Commemorative
1998 Major League Baseball home run record chase - Wikipedia