APA (7th ed.) Citation

Bondi, H., & Llull Sala, R. (1970). Cosmologia. Labor.

Chicago Style (17th ed.) Citation

Bondi, H., and Ramón Llull Sala. Cosmologia. Barcelona: Labor, 1970.

MLA (9th ed.) Citation

Bondi, H., and Ramón Llull Sala. Cosmologia. Labor, 1970.

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