American Psychological Association 7th edition

Petrus [Alfonsi]. (ca. 2009). Disciplina clericalis [Book]. In E. D’Angelo (ed.), Ricerca. Pacini.

Chicago Manual of Style 17th edition (author-date)

Petrus [Alfonsi]. 2009. Disciplina clericalis. Book. Edited by Edoardo D’Angelo. Ricerca. Scrittori latini dell’Europa medievale 8. Ospedaletto (Pisa): Pacini.

Springer - Basic (author-date)

Petrus [Alfonsi] (2009) Disciplina clericalis. Pacini, Ospedaletto (Pisa)

Springer - Lecture Notes in Computer Science

1.Petrus [Alfonsi]: Disciplina clericalis. Pacini, Ospedaletto (Pisa) (2009).

DIN 1505-2 (author-date, Deutsch) - standard superseded by ISO-690

Petrus [Alfonsi] ; D’Angelo, E. (ed.) ; ; : Disciplina clericalis, Scrittori latini dell’Europa medievale. book. Ospedaletto (Pisa) : Pacini, 2009 — ISBN 9788863151831

Warning: These citations may not always be 100% accurate.