Dyfyniad APA

Kelsch, M. L., & Kelsch, T. (1981). Writing effectively: A practical guide. Prentice-Hall.

Dyfyniad Arddull Chicago

Kelsch, Mary Lynn, and Thomas Kelsch. Writing Effectively: A Practical Guide. Englewood Cliffs, N.J.: Prentice-Hall, 1981.

Dyfyniad MLA

Kelsch, Mary Lynn, and Thomas Kelsch. Writing Effectively: A Practical Guide. Prentice-Hall, 1981.

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