Dyfyniad APA

(1979). Hearing before the committee on commerce, science, and transporatation United senate. Washington.

Dyfyniad Arddull Chicago

Hearing Before the Committee On Commerce, Science, and Transporatation United Senate. Washington, 1979.

Dyfyniad MLA

Hearing Before the Committee On Commerce, Science, and Transporatation United Senate. Washington, 1979.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.