Crawford, A. (2010). Yorkist lord: John Howard, Duke of Norfolk, c.1425-1485. Continuum.
Chicagoスタイル(17版)引用形式Crawford, Anne. Yorkist Lord: John Howard, Duke of Norfolk, C.1425-1485. London: Continuum, 2010.
MLA(9版)引用形式Crawford, Anne. Yorkist Lord: John Howard, Duke of Norfolk, C.1425-1485. Continuum, 2010.
警告: この引用は必ずしも正確ではありません.