Cita APA (7a ed.)

Williams, C. H. c. (1969). European research index: A guide to European research including medicine, agriculture, and engineering (2nd. ed.). Hodgson Limited.

Cita Chicago Style (17a ed.)

Williams, Colin H. comp. European Research Index: A Guide to European Research Including Medicine, Agriculture, and Engineering. 2nd. ed. Channel Islands: Hodgson Limited, 1969.

Cita MLA (9a ed.)

Williams, Colin H. comp. European Research Index: A Guide to European Research Including Medicine, Agriculture, and Engineering. 2nd. ed. Hodgson Limited, 1969.