APA (7th ed.) Citation

London Tourist Board. (1989). Survey among overseas visitors to London. London Tourist Board.

Chicago Style (17th ed.) Citation

London Tourist Board. Survey Among Overseas Visitors to London. London: London Tourist Board, 1989.

MLA (9th ed.) Citation

London Tourist Board. Survey Among Overseas Visitors to London. London Tourist Board, 1989.

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