एपीए उद्धरण

Friedrich, P. (1970). Proto-Indo-European trees: Arboreal system of prehistoric people. University of Chicago Press.

शिकागो स्टाइल उद्धरण

Friedrich, Paul. Proto-Indo-European Trees: Arboreal System of Prehistoric People. University of Chicago Press, 1970.

एमएलए उद्धरण

Friedrich, Paul. Proto-Indo-European Trees: Arboreal System of Prehistoric People. University of Chicago Press, 1970.