Not quite sure I follow: Book titles would be in italics anyway, though, so adding italics to them would reverse that (also, I'd generally discourage to edit the text of the citation proper if at all possible. It prevents proper updating of citations.
What we'd expect to happen would be to have this turn to Ernst Lohmeyer's Kyrios Jesus in the text. But maybe I'm misunderstanding you, so some more context would be helpful -- where are you making the changes, where are you expecting them to show up etc.
Oooppsss! Sorry it's a book section, so "Ernst Lohmeyer's Kyrios Jesus" is the title of a chapter in the book entitled Where Christology Began: Essays on Philippians 2
This is the full citation in FN: Colin Brown, “Ernst Lohmeyer's Kyrios Jesus,” in Where Christology Began: Essays on Philippians 2, ed. Ralph P. Martin and Brian J. Dodd (Louisville, Westminster John Knox Press, 1998), 7.
Book titles would be in italics anyway, though, so adding italics to them would reverse that (also, I'd generally discourage to edit the text of the citation proper if at all possible. It prevents proper updating of citations.
Ernst Lohmeyer's Kyrios Jesus
in the text. But maybe I'm misunderstanding you, so some more context would be helpful -- where are you making the changes, where are you expecting them to show up etc.