APA (7th ed.) Citation

(2010). Duisburg & Ruhrort: 1944 ; Duisburg sheet 2 (Reprint der 2nd ed. von 1945.). Alan Godfrey Maps.

Chicago Style (17th ed.) Citation

Duisburg & Ruhrort: 1944 ; Duisburg Sheet 2. Reprint der 2nd ed. von 1945. Leadgate: Alan Godfrey Maps, 2010.

MLA (9th ed.) Citation

Duisburg & Ruhrort: 1944 ; Duisburg Sheet 2. Reprint der 2nd ed. von 1945. Alan Godfrey Maps, 2010.

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