एपीए उद्धरण

(1992). Zoology Civil services Examination Prelimanary Screening Test. Sudha.

शिकागो स्टाइल उद्धरण

Zoology Civil Services Examination Prelimanary Screening Test. New Delhi: Sudha, 1992.

एमएलए उद्धरण

Zoology Civil Services Examination Prelimanary Screening Test. Sudha, 1992.