APA
Urquhart D., Young M., Cameron S., Walkefield R., Historic Scotland & Masonry Conservation Research Group. (1997). Biological growths on sandstone buildings: control and treatment. Edinburgh: Historic Scotland.
Chicago
Urquhart Dennis, Young Maureen, Cameron Sonja, Walkefield Rachael, Historic Scotland and Masonry Conservation Research Group. 1997. Biological growths on sandstone buildings: control and treatment. Edinburgh: Historic Scotland.
Harvard
Urquhart D., Young M., Cameron S., Walkefield R., Historic Scotland and Masonry Conservation Research Group. (1997). Biological growths on sandstone buildings: control and treatment. Edinburgh: Historic Scotland.
MLA
Urquhart Dennis, Young Maureen, Cameron Sonja, Walkefield Rachael, Historic Scotland and Masonry Conservation Research Group. Biological growths on sandstone buildings: control and treatment. Edinburgh: Historic Scotland. 1997.