Richardson, J. G. (2015). Long Life and How to Reach It.
Cita Chicago Style (17a ed.)Richardson, Joseph Gibbons. Long Life and How to Reach It. 2015.
Cita MLA (9a ed.)Richardson, Joseph Gibbons. Long Life and How to Reach It. 2015.
Precaución: Estas citas no son 100% exactas.