एपीए उद्धरण

Vivek K Gupta & Manoj Kaushik. Upkar's objective commerce. Upkar prakashan.

शिकागो स्टाइल उद्धरण

Vivek K Gupta और Manoj Kaushik. Upkar's Objective Commerce. Agra: Upkar prakashan.

एमएलए उद्धरण

Vivek K Gupta और Manoj Kaushik. Upkar's Objective Commerce. Upkar prakashan.