Sumner, J. R. Improve your marketing techniques : a guide for hotel managers and caterers / J.R. Sumner. - London : Northwood Books, 1982. - 191 p. : ill., facsims, forms ; 21 cm. Bibliography: p179-188. - Includes index. ISBN: 0719828449 Subjects--Topical Terms: Hotels, taverns, etc.--United Kingdom--Marketing.Food service--United Kingdom--Marketing.