APA (7th ed.) Citation

Hack, M. (1969). El Universo (3“ ed.). Labor.

Chicago Style (17th ed.) Citation

Hack, Margherita. El Universo. 3“ ed. [Barcelona]: Labor, 1969.

MLA (9th ed.) Citation

Hack, Margherita. El Universo. 3“ ed. Labor, 1969.

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