APA (7th ed.) Citation

Pudor, H. (1931). Helgoland - Heiligland. Pudor.

Chicago Style (17th ed.) Citation

Pudor, Heinrich. Helgoland - Heiligland. Leipzig: Pudor, 1931.

MLA (8th ed.) Citation

Pudor, Heinrich. Helgoland - Heiligland. Pudor, 1931.

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