Gaya APA

Setiadi, G. (2011). Optimation of nitrogen and phosphorus in azolla growth as biofertilizer (Vol. 15, No. 2, Tahun). : American foundations information service.

Gaya MLA

Setiadi, Gunawan. "Optimation of nitrogen and phosphorus in azolla growth as biofertilizer". Vol. 15, No. 2, Tahun : American foundations information service, 2011. Text.