Dyfyniad APA

(1986). U. S. scientists and engineers: 1986. Washington: National Science Foundation.

Dyfyniad Arddull Chicago

U. S. Scientists and Engineers: 1986. Washington: National Science Foundation, 1986.

Dyfyniad MLA

U. S. Scientists and Engineers: 1986. Washington: National Science Foundation, 1986.

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