APA

Williams C. H., . (1969). European research index ; a guide to European research including medicine, agriculture and engineering. London: Francis Hodgson.

Chicago

Williams Colin H, . 1969. European research index ; a guide to European research including medicine, agriculture and engineering. London: Francis Hodgson.

Harvard

Williams C. H., . (1969). European research index ; a guide to European research including medicine, agriculture and engineering. London: Francis Hodgson.

MLA

Williams Colin H, . European research index ; a guide to European research including medicine, agriculture and engineering. London: Francis Hodgson. 1969.