| Author | Titles | | 1.
| Appel, Karel, 1921-2006 | 12 | | 2.
| Appelbaum, Barbara | 1 | | 3.
| Appell, Paul, 1855-1930 | 1 | | 4.
| Appella, Giuseppe | 2 | | 5.
| Appellof, Marion | 2 | | 6.
| Appelt, Dieter, 1935- | 3 | | 7.
| Appenzeller, Lena | 1 | | 8.
| Appenzeller, Marina | 1 | | 9.
| Appercelle, Andrée, 1930- | 1 | | 10.
| Apphun, Charles | 1 |
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