APA
Walker A., . (2005). Understanding quality of life in old age. Maidenhead, Berkshire: Open University Press.
Chicago
Walker Alan, . 2005. Understanding quality of life in old age. Maidenhead, Berkshire: Open University Press.
Harvard
Walker A., . (2005). Understanding quality of life in old age. Maidenhead, Berkshire: Open University Press.
MLA
Walker Alan, . Understanding quality of life in old age. Maidenhead, Berkshire: Open University Press. 2005.