Dyfyniad APA
Lester, J. D. (1990). Writing research papers: A complete guide (6th ed.). Scott, Foresman/Little, Brown Higher Education.
Dyfyniad Arddull Chicago
Lester, James D. Writing Research Papers: A Complete Guide. 6th ed. Glenview, Ill.: Scott, Foresman/Little, Brown Higher Education, 1990.
Dyfyniad MLA
Lester, James D. Writing Research Papers: A Complete Guide. 6th ed. Scott, Foresman/Little, Brown Higher Education, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.