APA (7th ed.) Citation

London Transport Board & Penrose, D. (1972). London buses, map and list of routes. Waterlow & Sons Limited.

Chicago Style (17th ed.) Citation

London Transport Board and David Penrose. London Buses, Map and List of Routes. London: Waterlow & Sons Limited, 1972.

MLA (9th ed.) Citation

London Transport Board and David Penrose. London Buses, Map and List of Routes. Waterlow & Sons Limited, 1972.