Gaya APA
Barraclough, G.
(1968).
The medieval Papacy, with 100 ills., 24 in colour.
.
London:
Thames and Hudson.
Gaya MLA
Barraclough, Geoffrey..
"The medieval Papacy, with 100 ills., 24 in colour. ".
London:
Thames and Hudson,
1968.
Buku.