APA (7th ed.) Citation

URIS, L., & PORTA, B. (1973). QB VII. Círculo de lectores.

Chicago Style (17th ed.) Citation

URIS, Leon, and Baldomero PORTA. QB VII. Barcelona: Círculo de lectores, 1973.

MLA (9th ed.) Citation

URIS, Leon, and Baldomero PORTA. QB VII. Círculo de lectores, 1973.

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