APA (7th ed.) Citation

Vaughan, H. M., & Greiffenhagen, M. (2009). The Naples Riviera. Project Gutenberg.

Chicago Style (17th ed.) Citation

Vaughan, Herbert M., and Maurice Greiffenhagen. The Naples Riviera. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Vaughan, Herbert M., and Maurice Greiffenhagen. The Naples Riviera. Project Gutenberg, 2009.

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