Wie stelle ich die edition (Auflage) richtig ein?

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\begin{document}

Dieser Beispieltext zitiert \autocite[][15]{brandt} einen Artikel aus der 
Bib-Datei, welche in diesem Dokument angelegt wurde. Hier noch ein test.\autocite[][20]{markey} und auch noch \autocite[][24]{Schreyoegg2013}. Hier noch ein Test \autocite{averroes/bland}. Und weil es so schön ist, noch einer \autocite{malinowski}
\autocite{itzhaki}

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