South Polar chart / published at the Admiralty, 20th May, 1887. Great Britain. Hydrographic Office.
Chicago Style (17th ed.) CitationSouth Polar Chart / Published at the Admiralty, 20th May, 1887. Great Britain. Hydrographic Office.
MLA (9th ed.) CitationSouth Polar Chart / Published at the Admiralty, 20th May, 1887. Great Britain. Hydrographic Office.
Warning: These citations may not always be 100% accurate.