APA (7th ed.) Citation

London Transport Executive. (1968). Country walks (1968/69 ed.). London Transport.

Chicago Style (17th ed.) Citation

London Transport Executive. Country Walks. 1968/69 ed. Westminster: London Transport, 1968.

MLA (9th ed.) Citation

London Transport Executive. Country Walks. 1968/69 ed. London Transport, 1968.

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