| MLA | Citation: | (United Nations (General Assembly), pp.art. 9) |
| Bibliography: | United Nations (General Assembly). Principles for Older Persons. 1991. | |
| APA | Citation: | (United Nations (General Assembly), 1991, art. 9) |
| Bibliography: | United Nations (General Assembly). (1991). Principles for Older Persons. | |
| Chicago | Citation: | (United Nations (General Assembly) 1991) |
| Bibliography: | United Nations (General Assembly). 1991. Principles for Older Persons. |