Dyfyniad APA

(1992). Harvard review. Cambridge, MA: President and Fellows of Harvard College.

Dyfyniad Arddull Chicago

Harvard Review. Cambridge, MA: President and Fellows of Harvard College, 1992.

Dyfyniad MLA

Harvard Review. Cambridge, MA: President and Fellows of Harvard College, 1992.

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