| Author | Titles | | 1.
| Appel, Danièle | 1 | | 2.
| Appel Foundation (Amsterdão, Holanda) | 0 | | 3.
| Author is: Stichting De Appel (Amsterdão, Holanda) | 2 | | 4.
| Appel Jr., Alfred, 1934- | 1 | | 5.
| Appel, Karel, 1921-2006 | 12 | | 6.
| Appelbaum, Barbara | 1 | | 7.
| Appell, Paul, 1855-1930 | 1 | | 8.
| Appella, Giuseppe | 2 | | 9.
| Appellof, Marion | 2 | | 10.
| Appelt, Dieter, 1935- | 3 | | 11.
| Appenzeller, Lena | 1 |
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