APA

National Congress on the Quality of Life, National Congress on the Quality of Life & National Congress on the Quality of Life. (1974). The middle years: quality of life. Acton, Mass: Publishing Sciences Group.

Chicago

National Congress on the Quality of Life, National Congress on the Quality of Life and National Congress on the Quality of Life. 1974. The middle years: quality of life. Acton, Mass: Publishing Sciences Group.

Harvard

National Congress on the Quality of Life, National Congress on the Quality of Life and National Congress on the Quality of Life. (1974). The middle years: quality of life. Acton, Mass: Publishing Sciences Group.

MLA

National Congress on the Quality of Life, National Congress on the Quality of Life and National Congress on the Quality of Life. The middle years: quality of life. Acton, Mass: Publishing Sciences Group. 1974.