APA (7th ed.) Citation

(1990). St. Helena: Series OSD 2962 (ed. 1-OSD.). Ordnance Survey u.a.

Chicago Style (17th ed.) Citation

St. Helena: Series OSD 2962. ed. 1-OSD. Southampton u.a: Ordnance Survey u.a, 1990.

MLA (9th ed.) Citation

St. Helena: Series OSD 2962. ed. 1-OSD. Ordnance Survey u.a, 1990.