एपीए उद्धरण

Peterson, W. L. (1986). Principles of ecconomics. Universal Book Stall.

शिकागो स्टाइल उद्धरण

Peterson, Willis L. Principles of Ecconomics. New Delhi: Universal Book Stall, 1986.

एमएलए उद्धरण

Peterson, Willis L. Principles of Ecconomics. Universal Book Stall, 1986.