Gaya APA
SARAGIH, S, E.
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Pertanian Organik
(
Cet.2)
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Jakarta:
Penebar Swadaya.
Gaya MLA
SARAGIH, Sabastianh, Eliyas.
"Pertanian Organik".
Cet.2
Jakarta:
Penebar Swadaya,
2010.
Text.