APA引文

Sehgal, R. (1994). Introduction to universal decimal classification. Ess Ess.

Chicago Edition Citation

Sehgal, R.L. Introduction to Universal Decimal Classification. New Delhi: Ess Ess, 1994.

MLA引文

Sehgal, R.L. Introduction to Universal Decimal Classification. Ess Ess, 1994.

警告：這些引文格式不一定是100％准確.