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