APA (7th ed.) Citation

Gullon y Senespleda, E. (1933). EL ENIGMA SOLAR. Aguilar.

Chicago Style (17th ed.) Citation

Gullon y Senespleda, Enrique. EL ENIGMA SOLAR. Madrid: Aguilar, 1933.

MLA (9th ed.) Citation

Gullon y Senespleda, Enrique. EL ENIGMA SOLAR. Aguilar, 1933.

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