Sayles, G. O. (1950). The medieval foundations of England ([1st American ed., rev., with new pref. and introd.].). Philadelphia: University of Pennsylvania Press.
Чикагска система за цитиранеSayles, George Osborne. The Medieval Foundations of England. [1st American ed., rev., with new pref. and introd.]. Philadelphia: University of Pennsylvania Press, 1950.
MLA формат за цитиранеSayles, George Osborne. The Medieval Foundations of England. [1st American ed., rev., with new pref. and introd.]. Philadelphia: University of Pennsylvania Press, 1950.
Внимание: Тези цитати може да не са 100% точни.