APA-referens (7:e uppl.)
Portmann, J. (2010). Catholic culture in the USA: In and out of church. Continuum International Pub..
Chicago-referens (17:e uppl.)
Portmann, John. Catholic Culture in the USA: In and Out of Church. London ; New York: Continuum International Pub., 2010.
MLA-referens (9:e uppl.)
Portmann, John. Catholic Culture in the USA: In and Out of Church. Continuum International Pub., 2010.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.