APA (7th ed.) Citation

(1959). Helgoland. Verl. Der Neue Schulmann.

Chicago Style (17th ed.) Citation

Helgoland. Stuttgart: Verl. Der Neue Schulmann, 1959.

MLA (9th ed.) Citation

Helgoland. Verl. Der Neue Schulmann, 1959.

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