O (titres revues)

 Old Testament Abstracts ISSN 0364-8591
vol. 6, no. 1, 1983 -....

 Omnis terra (éd. française ; Union pontificale missionaire) ISSN 1120-0987
vol. 37, no. 339, 1998 - vol. 48, no. 430, 2007[lac.5%]

 Orientation (Institute of Reformational Studies - Potchefstroom University for Christian Higher Education) ISSN 1012-8018
no. 45, 1987 - no. 47, 1987 ; no. 51, 1988 - no. 52, 1988 ; no. 55, 1989 - no. 57, 1990

 Ouvertures ISSN 0397-6831
no. 82, 1996 -....