Savill, P. (1988). National hardwoods programme: Report of the eighth meeting and second meeting of the Uneven-aged Silviculture Group 7 January 1988. Oxford Forestry Institute, University of Oxford.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Savill, P. National Hardwoods Programme: Report of the Eighth Meeting and Second Meeting of the Uneven-aged Silviculture Group 7 January 1988. Oxford Forestry Institute, University of Oxford, 1988.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Savill, P. National Hardwoods Programme: Report of the Eighth Meeting and Second Meeting of the Uneven-aged Silviculture Group 7 January 1988. Oxford Forestry Institute, University of Oxford, 1988.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.