Gaya APA

SIREGAR, R., SIAHAAN, L. (2014). The effects of growth media and chitosan on haricot bean (Phaseolus vulgaris L) with verticulture . Medan: Universitas HKBP Nommensen.

Gaya MLA

SIREGAR, Rolan., SIAHAAN, Lasminar. "The effects of growth media and chitosan on haricot bean (Phaseolus vulgaris L) with verticulture ". Medan: Universitas HKBP Nommensen, 2014. Artikel.