2010 - The Heart, Mind and Spirit: Professor Mohamed Omar Salem
2008 - How People with Addictions Experienced Nature Awareness: Geoffrey McMullan
2007 - Natural Thinking: Dr Bill Bird
2006 - Green Exercise: University of Essex
2004 - Wilderness Therapy Magical Cure - Ivan Raymond
2000 - How Wilderness Therapy Works: Keith C. Russell, John C. Hendee,Dianne Phillips-Miller
2008 - How People with Addictions Experienced Nature Awareness: Geoffrey McMullan
2007 - Natural Thinking: Dr Bill Bird
2006 - Green Exercise: University of Essex
2004 - Wilderness Therapy Magical Cure - Ivan Raymond
2000 - How Wilderness Therapy Works: Keith C. Russell, John C. Hendee,Dianne Phillips-Miller