Motivation model offered by Maslow based upon five levels: (1) Food, warmth and shelter. (2) Safety and security. (3) Social needs and affiliation. (4) Ego needs and self esteem. (5) Self actualization
John Gilbertson (Ed.), Health and Safety Sound Bites, Category: Agriculture and Industry, Health and Safety Sound, County, ENCYCLO Online Encyclopedia, from Safety & Health Practitioner SHP (The Official Magazine of The Institution of Occupational Safety and Health (IOSH), United Business Media Limited, London, UK 2007. http://www.encyclo.co.uk/local/20474&page=4, (OSH - Brit) {117}