APA (7th ed.) Citation

Muñoz Box, R. (1957). Un amigo invisible. P.P.C.

Chicago Style (17th ed.) Citation

Muñoz Box, Rafael. Un Amigo Invisible. Madrid: P.P.C, 1957.

MLA (9th ed.) Citation

Muñoz Box, Rafael. Un Amigo Invisible. P.P.C, 1957.

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