@unpublished{repository17111,
            note = {Unpublished},
           title = {The Effectiveness
of Sludge in the Leaf
Fermentation Process},
       publisher = {IOP Conf. Series: Journal of Physics: Conf.},
             url = {http://repository.uhamka.ac.id/id/eprint/17111/},
          author = {Yuni, Astuti}
}