Harvey, A. P. (1972). Directory of scientific directories: A world guide to scientific directories including medicine, agriculture, engineering, manufacturing and industrial directories (2. ed.). Hodgson.
Chicago-Zitierstil (17. Ausg.)Harvey, Anthony P. Directory of Scientific Directories: A World Guide to Scientific Directories Including Medicine, Agriculture, Engineering, Manufacturing and Industrial Directories. 2. ed. Guernsey: Hodgson, 1972.
MLA-Zitierstil (9. Ausg.)Harvey, Anthony P. Directory of Scientific Directories: A World Guide to Scientific Directories Including Medicine, Agriculture, Engineering, Manufacturing and Industrial Directories. 2. ed. Hodgson, 1972.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.