S.R.T.O. d'Ardenne
| Author(s) | Title | Reference | |
|---|---|---|---|
| S.R.T.O. d'Ardenne | The Owl and the Nightingale. Early English Text Society, no. 251, by N. R. Ker | 34/1, p. 65 | |
| S.R.T.O. d'Ardenne | The Owl and the Nightingale. (Nelson's Medieval and Renaissance Library), by E. G. Stanley | 31/1, p. 72 |