Gaya APA

(et.al), W, ,, S. (1978). Identifying Constraints In Higher Rice Yield in Yogyakarta Indonesia . Yogyakarta: Faculty of Agriculture UGM.

Gaya MLA

(et.al), Widodo, ,, Sri.. "Identifying Constraints In Higher Rice Yield in Yogyakarta Indonesia". Yogyakarta: Faculty of Agriculture UGM, 1978. Buku.