Cita APA (7a ed.)
Ryder, R. D., & Singer, P. (2015). Speciesism, painism and happiness: A morality for the twenty-first century. Imprint Academic.
Cita Chicago Style (17a ed.)
Ryder, Richard D., y Peter Singer. Speciesism, Painism and Happiness: A Morality for the Twenty-first Century. Exeter, England: Imprint Academic, 2015.
Cita MLA (9a ed.)
Ryder, Richard D., y Peter Singer. Speciesism, Painism and Happiness: A Morality for the Twenty-first Century. Imprint Academic, 2015.
Precaución: Estas citas no son 100% exactas.