APA (7th ed.) Citation

Castle, A. (1987). The Corsican high level route: Walking the GR20. Cicerone Pr.

Chicago Style (17th ed.) Citation

Castle, Alan. The Corsican High Level Route: Walking the GR20. Milnthorpe: Cicerone Pr, 1987.

MLA (9th ed.) Citation

Castle, Alan. The Corsican High Level Route: Walking the GR20. Cicerone Pr, 1987.

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