APA (7th ed.) Citation

Wilde, O. (1990). Selected poems of Oscar Wilde. Project Gutenberg.

Chicago Style (17th ed.) Citation

Wilde, Oscar. Selected Poems of Oscar Wilde. Champaign, Ill: Project Gutenberg, 1990.

MLA (9th ed.) Citation

Wilde, Oscar. Selected Poems of Oscar Wilde. Project Gutenberg, 1990.