Παραπομπή APA

Pushpa , D. (2006). DDC classifying with dewey decimal classification editions 19th and 20th). Ess Ess.

Παραπομπή Chicago Style

Pushpa , Dhyani. DDC Classifying with Dewey Decimal Classification Editions 19th and 20th). New Delhi: Ess Ess, 2006.

Παραπομπή MLA

Pushpa , Dhyani. DDC Classifying with Dewey Decimal Classification Editions 19th and 20th). Ess Ess, 2006.