Microsoft will euthanize Zoo Tycoon Friends on April 28 due to technical failures - Windows Central

Windows Central · 2/4/2015

Xbox Live's Zoo Tycoon Friends launches for Windows Phone and Windows 8.1 - Windows Central

Windows Central · 10/13/2014

Microsoft brings Xbox Live game Zoo Tycoon Friends to both Windows Phone & Windows - nokiapoweruser.com

nokiapoweruser.com · 10/13/2014

Zoo Tycoon Friends Game Now Available For Download From Windows Phone Store - MSPoweruser

MSPoweruser · 10/13/2014

Zoo Tycoon Friends Adds More Ways to Care for Animals - XBOX Wire

XBOX Wire · 7/8/2014