- Robert Darlington et al (2012). History Alive. Australia: John Wiley & Sons. 92-93.
- Simon Newman. (2008). Feudalism in the Middle Ages. Available at: http://www.thefinertimes.com/Middle-Ages/feudalism-in-the-middle-ages.html
- Annenberg Foundation. (2015). the Middle Ages: Feudal System. Available at: http://www.learner.org/interactives/middleages/feudal.html
- Quizlet. (2015). Middle Ages: development of the Feudal System. Available at: http://quizlet.com/2316675/middle-ages-development-of-feudalism-essential-questions-flash-cards/
- Google.Sites. (2012). Feudal System - Life in the Middle Ages. Available at: https://sites.google.com/site/lifeinthemiddleagesvft/feudal-system
- Skwirk. (2012). Feudalism in the Church. Available: http://www.skwirk.com/p-c_s-14_u-176_t-477_c-1744/feudalism-the-societal-hierachy/nsw/feudalism-the-societal-hierachy/medieval-and-early-modern-societies-europe/the-structure-of-medieval-european-soci
- Middle Ages. (2015). Kings and Court. Available at: http://www.ducksters.com/history/middle_ages/kings_and_court.php.
- Simon Newman. (2008). Government in the Middle Ages. Available: http://www.thefinertimes.com/Middle-Ages/government-in-the-middle-ages.html.
- Simon Newman. (2008). Feudalism in the Middle Ages. Available at: http://www.thefinertimes.com/Middle-Ages/feudalism-in-the-middle-ages.html
- Annenberg Foundation. (2015). the Middle Ages: Feudal System. Available at: http://www.learner.org/interactives/middleages/feudal.html
- Quizlet. (2015). Middle Ages: development of the Feudal System. Available at: http://quizlet.com/2316675/middle-ages-development-of-feudalism-essential-questions-flash-cards/
- Google.Sites. (2012). Feudal System - Life in the Middle Ages. Available at: https://sites.google.com/site/lifeinthemiddleagesvft/feudal-system
- Skwirk. (2012). Feudalism in the Church. Available: http://www.skwirk.com/p-c_s-14_u-176_t-477_c-1744/feudalism-the-societal-hierachy/nsw/feudalism-the-societal-hierachy/medieval-and-early-modern-societies-europe/the-structure-of-medieval-european-soci
- Middle Ages. (2015). Kings and Court. Available at: http://www.ducksters.com/history/middle_ages/kings_and_court.php.
- Simon Newman. (2008). Government in the Middle Ages. Available: http://www.thefinertimes.com/Middle-Ages/government-in-the-middle-ages.html.