APA (7th ed.) Citation

Couperus, L., & Teixeira de Mattos, A. (2011). Ecstasy: A Study of Happiness A Novel. Project Gutenberg.

Chicago Style (17th ed.) Citation

Couperus, Louis, and Alexander Teixeira de Mattos. Ecstasy: A Study of Happiness A Novel. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Couperus, Louis, and Alexander Teixeira de Mattos. Ecstasy: A Study of Happiness A Novel. Project Gutenberg, 2011.

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