APA (7th ed.) Citation

Kelly's Directories Ltd. (1969). Kelly's post office directory map of London. Kelly's Directories Ltd..

Chicago Style (17th ed.) Citation

Kelly's Directories Ltd. Kelly's Post Office Directory Map of London. Kingston-upon-Thames: Kelly's Directories Ltd., 1969.

MLA (9th ed.) Citation

Kelly's Directories Ltd. Kelly's Post Office Directory Map of London. Kelly's Directories Ltd., 1969.

Warning: These citations may not always be 100% accurate.