Dyfyniad APA
Mayer, R. E. (1991). Thinking, problem solving, cognition (2nd. ed.). W. H. Freeman and company.
Dyfyniad Arddull Chicago
Mayer, Richard E. Thinking, Problem Solving, Cognition. 2nd. ed. New York: W. H. Freeman and company, 1991.
Dyfyniad MLA
Mayer, Richard E. Thinking, Problem Solving, Cognition. 2nd. ed. W. H. Freeman and company, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.