Newton, Richard (19 August 2005). "Maserati Quattroporte GT". automobilemag.com. Archived from the original on 23 September 2015. Retrieved 23 November 2014.
https://www.autozine.org/Archive/Maserati/new/Quattroporte_VI.html "Thanks to the addition of Ghibli, now it can be made larger and aim more squarely at F-segment rivals like Audi A8/S8, Mercedes S600/S63, BMW 750/760 and Jaguar XJ Supersport/XJR." "In fact, such a charming character let the old car to overcome its deficit in performance and consistently topped our F-segment performance car chart during the past 9 years! How can we be not worried?"
Newton, Richard (19 August 2005). "Maserati Quattroporte GT". automobilemag.com. Archived from the original on 23 September 2015. Retrieved 23 November 2014.