APA (7th ed.) Citation

Lewis, S. (1958). Aire libre. Cisne.

Chicago Style (17th ed.) Citation

Lewis, Sinclair. Aire Libre. [Barcelona]: Cisne, 1958.

MLA (9th ed.) Citation

Lewis, Sinclair. Aire Libre. Cisne, 1958.

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