APA (7th ed.) Citation

Sousa, J. P., & United States Marine Band. (2003). Semper Fidelis March. Project Gutenberg.

Chicago Style (17th ed.) Citation

Sousa, John Philip, and United States Marine Band. Semper Fidelis March. Project Gutenberg, 2003.

MLA (9th ed.) Citation

Sousa, John Philip, and United States Marine Band. Semper Fidelis March. Project Gutenberg, 2003.

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