APA (7th ed.) Citation

(1961). Berlin (4., verb. Aufl.). Knorr & Hirth.

Chicago Style (17th ed.) Citation

Berlin. 4., verb. Aufl. München [u.a.]: Knorr & Hirth, 1961.

MLA (9th ed.) Citation

Berlin. 4., verb. Aufl. Knorr & Hirth, 1961.

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