APA-viite (7. p.)
O'Callaghan, P. (2011). Christ our hope: An introduction to eschatology. Catholic University of America Press.
Chicago-viite (17. p.)
O'Callaghan, Paul. Christ Our Hope: An Introduction to Eschatology. Washington, District of Columbia: Catholic University of America Press, 2011.
MLA-viite (9. p.)
O'Callaghan, Paul. Christ Our Hope: An Introduction to Eschatology. Catholic University of America Press, 2011.
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