(1968). World ..: Series 1404 (Ed. 2-GSGS. Pr. ... by Ordnance Survey ... [19]68.). Directorate of Military Survey.
Chicago-Zitierstil (17. Ausg.)World ..: Series 1404. Ed. 2-GSGS. Pr. ... by Ordnance Survey ... [19]68. [London]: Directorate of Military Survey, 1968.
MLA-Zitierstil (9. Ausg.)World ..: Series 1404. Ed. 2-GSGS. Pr. ... by Ordnance Survey ... [19]68. Directorate of Military Survey, 1968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.