APA Style
Symbols and Abbreviations Used On Admiralty Paper Charts 5011 (INT 1) Edition 4. (2008).
United Kingdom:
Admiralty Charts and Publication.
MLA Style
Symbols and Abbreviations Used On Admiralty Paper Charts 5011 (INT 1) Edition 4.
4.
United Kingdom:
Admiralty Charts and Publication,
2008.
Text.