Glass said the errors came from an excerpt from "The Agony and the Ecstasy of Steve Jobs," a production by monologist Mike Daisey that was included in the broadcast.
Daisey responded to the retraction in a personal blog, saying, "I stand by my work."
'"This American Life' is essentially a journalistic not a theatrical enterprise, and as such it operates under a different set of rules and expectations," Daisey wrote. "For this reason, I regret that I allowed 'This American Life' to air an excerpt from my monologue. What I do is not journalism."
He didn't immediately respond to a request for comment.
Emily Condon, a spokeswoman for "This American Life," said the company plans to post a transcript of a show that elaborates on the retraction. "This American Life" is produced by Chicago Public Media and distributed by Public Radio International.
Steve Dowling, a spokesman for Cupertino, Calif.-based Apple, declined to comment.
New York-based China Labor Watch has said that workers making Apple products log 11 hours of work a day, six days a week, while production speeds are so high that workers aren't able to rest while making iPads.
Apple released a list of suppliers for the first time in January and publishes an annual report detailing instances of labor and environmental violations by some manufacturers.
Foxconn employs more than 1.2 million people in over 18 countries, chairman and founder Terry Gou said Dec. 1. The company has operations in Taiwan, Brazil, Mexico, Slovakia and Vietnam in addition to its China factories.