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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.