Cita APA (7th ed.)

Bion, W. R., & Bion, F. (2005). Cogitations (New extended ed.). Karnac Books.

Cita Chicago (17th ed.)

Bion, Wilfred R., i Francesca Bion. Cogitations. New extended ed. London: Karnac Books, 2005.

Cita MLA (9th ed.)

Bion, Wilfred R., i Francesca Bion. Cogitations. New extended ed. Karnac Books, 2005.