APA
Mollenkopf H., Walker A. & International Society for Quality of Life Studies. (2007). Quality of life in old age. Dordrecht: Springer.
Chicago
Mollenkopf Heidrun, Walker Alan and International Society for Quality of Life Studies. 2007. Quality of life in old age. Dordrecht: Springer.
Harvard
Mollenkopf H., Walker A. and International Society for Quality of Life Studies. (2007). Quality of life in old age. Dordrecht: Springer.
MLA
Mollenkopf Heidrun, Walker Alan and International Society for Quality of Life Studies. Quality of life in old age. Dordrecht: Springer. 2007.