| Author | Titles | | 1.
| Ruetz, Michael, 1940- | 2 | | 2.
| Ruf, Beatrix, 1960- | 21 | | 3.
| Ruf, Gerhard | 1 | | 4.
| Rüf, Isabelle | 1 | | 5.
| Ruff, Thomas, 1958- | 16 | | 6.
| Ruffe, Léon | 1 | | 7.
| Ruffet-Troussard, Julie | 1 | | 8.
| Ruffey, Pierre Xavier Emmanuel | 1 | | 9.
| Ruffieux, Jean-Marie | 1 | | 10.
| Ruffilli, Paolo | 1 |
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