Jones, M. K., & Underwood, M. G. (1992). The king's mother: Lady Margaret Beaufort, countess of Richmond and Derby (1. publ.). Cambridge University Press.
Citazione stile Chigago Style (17a edizione)Jones, Michael K., e Malcolm G. Underwood. The King's Mother: Lady Margaret Beaufort, Countess of Richmond and Derby. 1. publ. Cambridge [u.a.]: Cambridge University Press, 1992.
Citatione MLA (8a ed.)Jones, Michael K., e Malcolm G. Underwood. The King's Mother: Lady Margaret Beaufort, Countess of Richmond and Derby. 1. publ. Cambridge University Press, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.