APA Style

Office, U, K, H. (2015). Admiralty List Of Radio Signals (pilot services, Vessel Traffic Services and Port Operations (2015). United Kingdom: United Kingdom Hydrographic Office.

MLA Style

Office, United, Kingdom, Hydrographic. "Admiralty List Of Radio Signals (pilot services, Vessel Traffic Services and Port Operations". 2015 United Kingdom: United Kingdom Hydrographic Office, 2015. Text.