APA
International Institute for Conservation of Historic and Artistic Works, Smith P. 1. & Mills J. S. (. S. (1990). Cleaning, retouching and coatings : technology and practice for easel paintings and polychrome sculpture : preprints of the contributions to the Brussels congress, 3-7 September 1990. London: International Institute for Conservation of Historic and Artistic Works.
Chicago
International Institute for Conservation of Historic and Artistic Works, Smith Perry 1944 and Mills John S (John Stuart). 1990. Cleaning, retouching and coatings : technology and practice for easel paintings and polychrome sculpture : preprints of the contributions to the Brussels congress, 3-7 September 1990. London: International Institute for Conservation of Historic and Artistic Works.
Harvard
International Institute for Conservation of Historic and Artistic Works, Smith P. 1. and Mills J. S. (. S. (1990). Cleaning, retouching and coatings : technology and practice for easel paintings and polychrome sculpture : preprints of the contributions to the Brussels congress, 3-7 September 1990. London: International Institute for Conservation of Historic and Artistic Works.
MLA
International Institute for Conservation of Historic and Artistic Works, Smith Perry 1944 and Mills John S (John Stuart). Cleaning, retouching and coatings : technology and practice for easel paintings and polychrome sculpture : preprints of the contributions to the Brussels congress, 3-7 September 1990. London: International Institute for Conservation of Historic and Artistic Works. 1990.