APA (7th ed.) Citation

Westerman, P. F. The Sea-girt Fortress: A Story of Heligoland.

Chicago Style (17th ed.) Citation

Westerman, Percy F. The Sea-girt Fortress: A Story of Heligoland.

MLA (9th ed.) Citation

Westerman, Percy F. The Sea-girt Fortress: A Story of Heligoland.

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