Dyfyniad APA

Lester, J. D. (1987). Writing research papers: A complete guide (5th ed.). Scott, Foresman.

Dyfyniad Arddull Chicago

Lester, James D. Writing Research Papers: A Complete Guide. 5th ed. Glenview, Illinois: Scott, Foresman, 1987.

Dyfyniad MLA

Lester, James D. Writing Research Papers: A Complete Guide. 5th ed. Scott, Foresman, 1987.

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