== Codice sorgente GABC ==
<pre>
codicename:Tu es Petrus (Antiphona);office-part:Antiphona;mode:7;book:The Liber Usualis, 1961, p. 1515 & The Liber Usualis, 1961, p. 1578 & Cantus selecti, 1957, p. 230*;transcriber:Andrew Hinkley;%%(c3) TU(i_g) es(i_j) Pe(i.)trus,(i.) *(,) et(i) su(i')per(g) hanc(h_g) pe(e.)tram(e.) (;) æ(g)di(ghg)fi(f')cá(h)bo(g'_) (,) Ec(f)clé(e_f)si(g)am(f) me(e.)am.(e.) (::)
</pre>
== Bibliografia ==
* Wikipedia.org, versione italiana, https://it.wikipedia.org