APA Style

Admiralty : The Nautical Almanac Her Majesty's Nautical Almanac Office NP314-18 2018. (2017). United Kingdom: United Kingdom Hydrographic Office.

MLA Style

Admiralty : The Nautical Almanac Her Majesty's Nautical Almanac Office NP314-18 2018. . United Kingdom: United Kingdom Hydrographic Office, 2017. Text.