Gaya APA

barley, K., D.R., I, G, R, I, L. (). The agronomy of annual crops a course manual . Hogkong: Hogkong: ; Dai Nippon.

Gaya MLA

barley, K.P.., D.R., I., Graham,, R.D, II., Laing,. "The agronomy of annual crops a course manual". Hogkong: Hogkong: ; Dai Nippon, . Text.