Dyfyniad APA

Heffernan, J. A. W., & Lincoln, J. E. (1986). Writing, a college workbook (2nd ed.). Norton.

Dyfyniad Arddull Chicago

Heffernan, James A. W., and John E. Lincoln. Writing, a College Workbook. 2nd ed. New York: Norton, 1986.

Dyfyniad MLA

Heffernan, James A. W., and John E. Lincoln. Writing, a College Workbook. 2nd ed. Norton, 1986.

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