Capponiano 231, f 238 and Chigiano G. III 66. f 108. as cited by Colalucci Carlo Pietrangeli, Foreword to The Sistine Chapel, ed.
Capponiano 231, f 238 and Chigiano G. III 66. f 108. (як процитовано Колалуччі) Carlo Pietrangeli, Foreword to The Sistine Chapel, ed.