Dyfyniad APA

Jacobson, W. J. (1965). Thinking ahead in science. American book.

Dyfyniad Arddull Chicago

Jacobson, Willard J. Thinking Ahead in Science. [New York]: American book, 1965.

Dyfyniad MLA

Jacobson, Willard J. Thinking Ahead in Science. American book, 1965.

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