एपीए उद्धरण

Berwich, G. (2009). Science And Environment Series 1. Tổng HợpTP HCM.

शिकागो स्टाइल उद्धरण

Berwich, Gwen. Science And Environment Series 1. Tổng HợpTP HCM, 2009.

एमएलए उद्धरण

Berwich, Gwen. Science And Environment Series 1. Tổng HợpTP HCM, 2009.