[1] Apple - iTunes - Podcasts - Making a Podcast ( (Apple Inc. 著, 6/2/2012, 2:52:39 PM 版)) <http://www.apple.com/itunes/podcasts/specs.html>

[2] Apple - iTunes - Podcasts - Making a Podcast ( (Apple Inc. 著, 8/10/2013, 7:21:20 PM 版)) <http://www.apple.com/itunes/podcasts/specs.html>