APA (7th ed.) Citation

(1969). European research index: A guide to European research incl. medicine, agriculture, and engineering (2. ed.). Hodgson.

Chicago Style (17th ed.) Citation

European Research Index: A Guide to European Research Incl. Medicine, Agriculture, and Engineering. 2. ed. Guernsey: Hodgson, 1969.

MLA (9th ed.) Citation

European Research Index: A Guide to European Research Incl. Medicine, Agriculture, and Engineering. 2. ed. Hodgson, 1969.