APA Style
Universal Decimal Classification Ed.3. (1961).
UK:
British Standards Institution.
Chicago Style
Universal Decimal Classification Ed.3.
3.
UK:
British Standards Institution,
1961.
.
MLA Style
Universal Decimal Classification Ed.3.
3.
UK:
British Standards Institution,
1961.
.
Turabian Style
Universal Decimal Classification Ed.3.
UK:
British Standards Institution,
1961.
.