Tim Rutherford-Johnson, Oxford University Press, 2012, retrieved 17 May 2018 (subscription required) Gorlinski, pp. 117 Briscoe, James R.
Tim Rutherford-Johnson, Oxford University Press, 2012, retrieved 17 May 2018 (ფასიანი რეგისტრაცია) ↑ Gorlinski, pp. 117 ↑ Briscoe, James R.