Спејс шатл: Разлика помеѓу преработките

| publisher = [[Futron]]

}}</ref><ref name="usatoday">[http://www.usatoday.com/news/nation/2003-02-04-shuttle-critics_x.htm USATODAY.com - Critics scrutinize cost of shuttle<!-- Bot generated title -->]</ref><ref name="columbia_hearing">{{cite web | url = http://caib.nasa.gov/events/public_hearings/20030423/transcript_am.html | title = Columbia accident investigation board, public hearing |date= [[23 April]] [[2003]] | publisher = [[NASA]] | accessdate = 2006-08-06}}</ref>