How do I cite KaleidaGraph?

Here are a few examples that can serve as a guide:

KaleidaGraph, Version 4.5.4 for Windows. Synergy Software, Reading, PA, USA. www.synergy.com.

Nonlinear curve fit was performed using KaleidaGraph version 4.5.4 for Windows, Synergy Software, Reading, PA, USA. www.synergy.com.