APA (7th ed.) Citation

Schiller, F. (2004). Philosophical Letters of Friedrich Schiller. Project Gutenberg.

Chicago Style (17th ed.) Citation

Schiller, Friedrich. Philosophical Letters of Friedrich Schiller. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Schiller, Friedrich. Philosophical Letters of Friedrich Schiller. Project Gutenberg, 2004.

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