Cita APA (7a ed.)

Tapia, M. d. C. (1997). Beyond the threshold: A life in Opus Dei. Continuum.

Cita Chicago Style (17a ed.)

Tapia, María del Carmen. Beyond the Threshold: A Life in Opus Dei. New York: Continuum, 1997.

Cita MLA (9a ed.)

Tapia, María del Carmen. Beyond the Threshold: A Life in Opus Dei. Continuum, 1997.