APA (7th ed.) Citation

(1949). The blue bells of Scotland: Keys E♭ and F. Paterson's Publications.

Chicago Style (17th ed.) Citation

The Blue Bells of Scotland: Keys E♭ and F. London, England: Paterson's Publications, 1949.

MLA (9th ed.) Citation

The Blue Bells of Scotland: Keys E♭ and F. Paterson's Publications, 1949.