Abello, M. M. (2013). Boosting Sagada's arabica coffee. Agriculture.
Cita Chicago (17th ed.)Abello, Melpha M. "Boosting Sagada's Arabica Coffee." Agriculture 2013.
Cita MLA (9th ed.)Abello, Melpha M. "Boosting Sagada's Arabica Coffee." Agriculture, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.