APA (7th ed.) Citation

Sousa, J. P. (1996). The Fifth String. Project Gutenberg.

Chicago Style (17th ed.) Citation

Sousa, John Philip. The Fifth String. Project Gutenberg, 1996.

MLA (9th ed.) Citation

Sousa, John Philip. The Fifth String. Project Gutenberg, 1996.

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