APA (7th ed.) Citation

Cooper, G., & Abreu Fetter, C. El libro de las almas.

Chicago Style (17th ed.) Citation

Cooper, Glenn, and Carlos Abreu Fetter. El Libro De Las Almas. Madrid.

MLA (9th ed.) Citation

Cooper, Glenn, and Carlos Abreu Fetter. El Libro De Las Almas.

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