एपीए उद्धरण

(1995). A geography of Pennsylvania. University Park: Pennsylvania State University Press.

शिकागो स्टाइल उद्धरण

A Geography of Pennsylvania. University Park: Pennsylvania State University Press, 1995.

एमएलए उद्धरण

A Geography of Pennsylvania. University Park: Pennsylvania State University Press, 1995.

चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.