| Verfasser | Häufigkeit |
| Bizup, Joseph 1966- |
4 |
| Colomb, Gregory G. 1951-2011 |
4 |
| Williams, Joseph M. 1933-2008 |
4 |
| Booth, Wayne C. 1921-2005 |
3 |
| Turabian, Kate L. 1893-1987 |
3 |
| FitzGerald, William T. |
2 |
| Fitzgerald, William T. |
2 |
| Fitzgerald, Maurice J. T. 1929- |
1 |
| Gruener, Gregory |
1 |
| Hamilton, Mark W. 1964- |
1 |
| Mtui, Estomih |
1 |
| Peterson, Jeffrey 1964- |
1 |