Gaya APA

PURBA, R, S. et al (2020). The effect of spent bleaching earth filler-based NPK fertilization on proline, growth and yield of maize. . Surakarta: Fakulty of Agriculture Universitas Sebelas Maret.

Gaya MLA

PURBA, Ranggi, Sumanjaya. et al. "The effect of spent bleaching earth filler-based NPK fertilization on proline, growth and yield of maize.". Surakarta: Fakulty of Agriculture Universitas Sebelas Maret, 2020. Artikel.