APA (7th ed.) Citation

Hedley, O. (1991). Her Majesty's Tower of London (Rev. ed.). Pitkin.

Chicago Style (17th ed.) Citation

Hedley, Olwen. Her Majesty's Tower of London. Rev. ed. Andover: Pitkin, 1991.

MLA (8th ed.) Citation

Hedley, Olwen. Her Majesty's Tower of London. Rev. ed. Pitkin, 1991.