Παραπομπή APA

(1980). Information directory 1980: Current publications, films and services. Watford: Building Research Establishement.

Παραπομπή Chicago Style

Information Directory 1980: Current Publications, Films and Services. Watford: Building Research Establishement, 1980.

Παραπομπή MLA

Information Directory 1980: Current Publications, Films and Services. Watford: Building Research Establishement, 1980.

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