Burne 1949, p. 48. Burne, Alfred (1949). The Noble Duke of York: The Military Life of Frederick Duke of York and Albany. London: Staples Press. OCLC716545255.
Burne 1949, p. 49. Burne, Alfred (1949). The Noble Duke of York: The Military Life of Frederick Duke of York and Albany. London: Staples Press. OCLC716545255.
Burne 1949, pp. 59–60. Burne, Alfred (1949). The Noble Duke of York: The Military Life of Frederick Duke of York and Albany. London: Staples Press. OCLC716545255.