Dyfyniad APA

Ashok Singh. (2019). UPSC Civil services prelims: General studies-1. wiley.

Dyfyniad Arddull Chicago

Ashok Singh. UPSC Civil Services Prelims: General Studies-1. New Delhi: wiley, 2019.

Dyfyniad MLA

Ashok Singh. UPSC Civil Services Prelims: General Studies-1. wiley, 2019.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.