Gaya APA
McBrien, R, P. (2006).
The Pocket Guide to the Popes (First Edition).
United States of America:
HarperSanFransisco.
Gaya MLA
McBrien, Richard, P..
"The Pocket Guide to the Popes".
First Edition
United States of America:
HarperSanFransisco,
2006.
e-book.