APA (7th ed.) Citation

Gutiérrez Sobral, J. (1913). Estrecho de Gibraltar. [s.n.].

Chicago Style (17th ed.) Citation

Gutiérrez Sobral, José. Estrecho De Gibraltar. Madrid: [s.n.], 1913.

MLA (9th ed.) Citation

Gutiérrez Sobral, José. Estrecho De Gibraltar. [s.n.], 1913.

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