Gaya APA

Gateways to science. (1979). New York: [s.n.].

Gaya Chicago

Gateways to science. . New York: [s.n.], 1979. Text.

Gaya MLA

Gateways to science. . New York: [s.n.], 1979. Text.

Gaya Turabian

Gateways to science. New York: [s.n.], 1979. Print.