APA (7th ed.) Citation

Gaya, F. (1920). Principis practics. [editor no identificat].

Chicago Style (17th ed.) Citation

Gaya, F. Principis Practics. Barcelona: [editor no identificat], 1920.

MLA (9th ed.) Citation

Gaya, F. Principis Practics. [editor no identificat], 1920.

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