Gaya APA
Okeke, V, M. (1990).
Peace: with special reference to 'Gaudium et Spes': a moral approach. .
Roma:
PontUnivLateranensis dsl.
Gaya MLA
Okeke, Valerian, Maduka.
"Peace: with special reference to 'Gaudium et Spes': a moral approach. ".
Roma:
PontUnivLateranensis dsl,
1990.
Buku.