APA (7th ed.) Citation

Yagual Severino, J., & Zhingri Ortega, L. (2012). La Esfera Celeste.

Chicago Style (17th ed.) Citation

Yagual Severino, Jorge, and Luis Zhingri Ortega. La Esfera Celeste. 2012.

MLA (9th ed.) Citation

Yagual Severino, Jorge, and Luis Zhingri Ortega. La Esfera Celeste. 2012.

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