Παραπομπή σε μορφή APA (7η εκδ.)

Åfors, M. (1994). Weeds and weed management in small-scale cropping systems in northern Zambia. Dept. of Crop Production Science, Swedish University of Agricultural Sciences.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Åfors, Marie. Weeds and Weed Management in Small-scale Cropping Systems in Northern Zambia. Uppsala: Dept. of Crop Production Science, Swedish University of Agricultural Sciences, 1994.

Παραπομπή σε μορφή MLA (8th εκδ.)

Åfors, Marie. Weeds and Weed Management in Small-scale Cropping Systems in Northern Zambia. Dept. of Crop Production Science, Swedish University of Agricultural Sciences, 1994.