APA (7th ed.) Citation

Lem, S. (1981). Vacío perfecto. Bruguera.

Chicago Style (17th ed.) Citation

Lem, Stanislaw. Vacío Perfecto. Barcelona: Bruguera, 1981.

MLA (9th ed.) Citation

Lem, Stanislaw. Vacío Perfecto. Bruguera, 1981.

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