एपीए उद्धरण

Booulding, K. E. (1964). The meaning of the Twentieth Century. Higginbothams.

शिकागो स्टाइल उद्धरण

Booulding, Kenneth E. The Meaning of the Twentieth Century. Madras: Higginbothams, 1964.

एमएलए उद्धरण

Booulding, Kenneth E. The Meaning of the Twentieth Century. Higginbothams, 1964.