APA-viite (7. p.)

Barr, A., & Packard, T. (2005). Seeking solutions to vulnerability in old age: Preferences, constraints, and alternatives for coverage under Peru’s pension system. CSAE (University of Oxford).

Chicago-viite (17. p.)

Barr, A., ja T. Packard. Seeking Solutions to Vulnerability in Old Age: Preferences, Constraints, and Alternatives for Coverage Under Peru’s Pension System. CSAE (University of Oxford), 2005.

MLA-viite (9. p.)

Barr, A., ja T. Packard. Seeking Solutions to Vulnerability in Old Age: Preferences, Constraints, and Alternatives for Coverage Under Peru’s Pension System. CSAE (University of Oxford), 2005.