Dyfyniad APA

(1978). Writing for results: Principles and practice / Dugan Laird.

Dyfyniad Arddull Chicago

Writing for Results: Principles and Practice / Dugan Laird. 1978.

Dyfyniad MLA

Writing for Results: Principles and Practice / Dugan Laird. 1978.

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