You can reference our manuscript that was published in Current Protocols in Cytometry in July 2010. For example, your citation might look like this:

Text: "Data were analyzed using Cytobank [1]"

Reference:

[1] Kotecha N, Krutzik PO, Irish JM.   Web-based Analysis and Publication of Flow Cytometry Experiments.  Current Protocols in Cytometry 2010 Jul, Chapter 10, Unit10.17. PMID: 20578106