Gaya APA
Coelho, P., Costa, M, J. (2007).
The Witch of Portobello: Paulo Coelho (edisi paperback).
London, UK:
Harper Collins Publishers.
Gaya MLA
Coelho, Paulo., Costa, Margaret, Jull.
"The Witch of Portobello: Paulo Coelho".
edisi paperback
London, UK:
Harper Collins Publishers,
2007.
Text.