एपीए उद्धरण

POSTLETHWAIT,JOHN H & HOPSON,JANET L. (1992). THE NATURE OF LIFE (2.). MCGRAW - HILL BOOK CO.

शिकागो स्टाइल उद्धरण

POSTLETHWAIT,JOHN H & HOPSON,JANET L. THE NATURE OF LIFE. 2. NEW YORK: MCGRAW - HILL BOOK CO, 1992.

एमएलए उद्धरण

POSTLETHWAIT,JOHN H & HOPSON,JANET L. THE NATURE OF LIFE. 2. MCGRAW - HILL BOOK CO, 1992.