एपीए उद्धरण

(1973). last two million years: History of man. Readers Digest Association.

शिकागो स्टाइल उद्धरण

Last Two Million Years: History of Man. London: Readers Digest Association, 1973.

एमएलए उद्धरण

Last Two Million Years: History of Man. Readers Digest Association, 1973.