Cita APA (7a ed.)

Richardson, K., Spears, D., & Richards, M. (1972). Race, culture and intelligence. Penguin Books.

Cita Chicago Style (17a ed.)

Richardson, Ken, David Spears, y Martin Richards. Race, Culture and Intelligence. Harmondsworth: Penguin Books, 1972.

Cita MLA (8a ed.)

Richardson, Ken, et al. Race, Culture and Intelligence. Penguin Books, 1972.