Dyfyniad APA

Williams, W., & Tressler, J. C. (1923). Composition and rhetoric by practice. D.C. Heath & Co., Publishers.

Dyfyniad Arddull Chicago

Williams, William, and Jacob C. Tressler. Composition and Rhetoric by Practice. Boston ; New York [etc.]: D.C. Heath & Co., Publishers, 1923.

Dyfyniad MLA

Williams, William, and Jacob C. Tressler. Composition and Rhetoric by Practice. D.C. Heath & Co., Publishers, 1923.

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