The letters of Queen Victoria :
a selection from Her Majesty's correspondence between the years 1837 and 1861, published by authority of His Majesty the King /
edited by Arthur Christopher Benson and Viscount Esher.
APA Citation
Victoria, Q. of Great Britain., Esher, R. Baliol Brett., Benson, A. Christopher. (1908). The letters of Queen Victoria: a selection from Her Majesty's correspondence between the years 1837 and 1861, published by authority of His Majesty the King. London: John Murray.
MLA Citation
Victoria, Queen of Great Britain, 1819-1901, Reginald Baliol Brett Esher, and Arthur Christopher Benson. The Letters of Queen Victoria: a Selection From Her Majesty's Correspondence Between the Years 1837 And 1861, Published by Authority of His Majesty the King. London: John Murray, 1908.
Warning: These citations may not always be complete (especially for serials).