APA (7th ed.) Citation

Smullyan, R. M. (2017). El Universo de Gödel. Salvat.

Chicago Style (17th ed.) Citation

Smullyan, Raymond M. El Universo De Gödel. Barcelona: Salvat, 2017.

MLA (9th ed.) Citation

Smullyan, Raymond M. El Universo De Gödel. Salvat, 2017.

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