Henderson, G. P. (1969). Current european directories: Annotated guide to international, national, city and specialised directories and similar reference works for all countries of Europe. Kent: CBD Research.
Παραπομπή Chicago StyleHenderson, G. P. Current European Directories: Annotated Guide to International, National, City and Specialised Directories and Similar Reference Works for All Countries of Europe. Kent: CBD Research, 1969.
Παραπομπή MLAHenderson, G. P. Current European Directories: Annotated Guide to International, National, City and Specialised Directories and Similar Reference Works for All Countries of Europe. Kent: CBD Research, 1969.
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