History of Monument Park
New York Yankees retired numbers: Is team too generous? - Sports
Stadium #18: The “New-and-Improved” Yankee Stadium pres. by Globo
Bizarre omissions from Monument Park - Pinstripe Alley
Yankees retired numbers and the baseball legends who wore them
Yogi Berra - Wikipedia
New York Yankees Retired Numbers - - Database of
The New York Yankees unveil a granite monument to Babe Ruth
List of Yankee Retired Numbers in Monument Park - Newsday
Baseball legend Yogi Berra dies at 90 - BBC News