APA (7th ed.) Citation

London Transport Board, Cook, Hammond & Kell Ltd, & Penrose, D. (1976). London buses, map and list of routes. Waterlow.

Chicago Style (17th ed.) Citation

London Transport Board, Hammond & Kell Ltd Cook, and David Penrose. London Buses, Map and List of Routes. London: Waterlow, 1976.

MLA (9th ed.) Citation

London Transport Board, et al. London Buses, Map and List of Routes. Waterlow, 1976.