APA (7th ed.) Citation

(1974). Delgado, Humberto. . Rio, Manuel.

Chicago Style (17th ed.) Citation

Delgado, Humberto. . Rio, Manuel. 1974.

MLA (8th ed.) Citation

Delgado, Humberto. . Rio, Manuel. 1974.

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