APA (7th ed.) Citation

Ralphson, G. H. Boy Scouts in the North Sea; Or, the Mystery of "U-13".

Chicago Style (17th ed.) Citation

Ralphson, G. Harvey. Boy Scouts in the North Sea; Or, the Mystery of "U-13".

MLA (9th ed.) Citation

Ralphson, G. Harvey. Boy Scouts in the North Sea; Or, the Mystery of "U-13".

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