EVIZAL, RUSDI, 		TOHARI, TOHARI, 		PRIJAMBADA, IRFAN D., AND 		WIDADA, JAKA.
" Peranan Serasah Terhadap Sumbangan N dan P pada Agroekosistem Kopi" <em>Agrotrop : Journal on Agriculture Science</em> [Online], Volume 2 Number 2 (22 January 2014)