Harrison, R. (1999). Earth: The conservation and repair of Bowhill, Exeter : working with cob. London: James and James.
استشهاد بنمط شيكاغوHarrison, Ray. Earth: The Conservation and Repair of Bowhill, Exeter : Working With Cob. London: James and James, 1999.
MLA استشهادHarrison, Ray. Earth: The Conservation and Repair of Bowhill, Exeter : Working With Cob. London: James and James, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.