APA:
Durand, Guillaume (1300-1500). Ordo pontificalis (16a–171a). Benedictiones pontificales (171a–195a). URN:NBN:SI:IMG-DLZ048RH from http://www.dlib.si
MLA:
Durand, Guillaume. Ordo pontificalis (16a–171a). Benedictiones pontificales (171a–195a). 1300-1500.
<http://www.dlib.si/?URN=URN:NBN:SI:IMG-DLZ048RH>