एपीए उद्धरण

(1970). Challenges from the future. Kodansha: Japan Society of Futurology.

शिकागो स्टाइल उद्धरण

Challenges From the Future. Kodansha: Japan Society of Futurology, 1970.

एमएलए उद्धरण

Challenges From the Future. Kodansha: Japan Society of Futurology, 1970.