1. Advisory Group on Working Time and the Distribution of Work1994. Report of the advisory group on working time and the distribution of work Human Resources Development Canada, Ottawa, Ontario.
2. American Association of Retired Persons1986. Workers over 50: Old myths, new realities Author, Washington, DC.
3. Atchley R., 1988. Social forces and aging 5th ed. Wadsworth, Belmont, CA.
4. Berkowitz M., 1988. Functioning ability and job performance as workers age. Borus M. E., Parnes H. S., Sandell S. H., Seidman B., ed.The older worker87-114. Industrial Relations Research Association, Madison, WI.
5. Bytheway B., 1995. Ageism Open University Press, Buckingham, England.