एपीए उद्धरण

Sugden, D. R. (2009). Gray markets: Prevention, detection, and litigation. Oxford University Press.

शिकागो स्टाइल उद्धरण

Sugden, David R. Gray Markets: Prevention, Detection, and Litigation. Oxford: Oxford University Press, 2009.

एमएलए उद्धरण

Sugden, David R. Gray Markets: Prevention, Detection, and Litigation. Oxford University Press, 2009.