An official publication is a publication published by Parliament, a government department (UK or foreign), devolved government or an international organisation such as the European Union or World Health Organization. Sometimes there is no personal author so the organisation is deemed to be the corporate author.
1000 Lives Improvement (2014) outline that...
...(1000 Lives Improvement, 2014).
Online Official Publication
Corporate author. (Year). Title. Retrieved from URL
1000 Lives Improvement. (2014). The quality improvement guide. Retrieved
Print Official Publication
Corporate author. (Year). Title. Place of Publication: Publisher.
1000 Lives Improvement. (2014). The quality improvement guide. Cardiff: 1000 Lives Improvement.