(原始内容存档于2008-06-23). Circus (音像媒体说明). BritneySpears. JIVE Records. 2008. Jennifer Vineyard. BritneySpears' collaborators talk about new album. MTV News. Viacom
Review: BritneySpears is back in control on her sexy new album 'Glory'. Los Angeles Times. 2016-08-26 [2016-08-27]. (原始内容存档于2016-08-27). BritneySpears -