Cita APA (7a ed.)
Davidson, E. (2014). Manure happens: Altering the global nitrogen cycle by feeding about seven billion carnivorous humans. University of Maryland.
Cita Chicago Style (17a ed.)
Davidson, E.A. Manure Happens: Altering the Global Nitrogen Cycle by Feeding About Seven Billion Carnivorous Humans. University of Maryland, 2014.
Cita MLA (9a ed.)
Davidson, E.A. Manure Happens: Altering the Global Nitrogen Cycle by Feeding About Seven Billion Carnivorous Humans. University of Maryland, 2014.
Precaución: Estas citas no son 100% exactas.