Cita APA (7th ed.)

Burbidge, N., Gray, P., Levy, S., & Rinvolucri. (1996). Letters. Oxford University Press.

Cita Chicago (17th ed.)

Burbidge, Nicky, Peta Gray, Sheila Levy, i Rinvolucri. Letters. Oxford: Oxford University Press, 1996.

Cita MLA (9th ed.)

Burbidge, Nicky, et al. Letters. Oxford University Press, 1996.