A standard reference for this type of results is

Bertram Huppert: <em>Endliche Gruppen I</em>, Band 134 der <em>Grundlehren der
mathematischen Wissenschaften</em>, 1967, Springer-Verlag.

However I don't have that book at hand, so I cannot check.
Another source you might wish to check is

Jean Dieudonne: <em>La Geometrie des Groupes Classiques</em>,
Ergebnisse der Mathematik und ihrer Grenzgebiete 5(1963).