Dyfyniad APA

(1990). In answer to your query: Contribution to collective work.

Dyfyniad Arddull Chicago

In Answer to Your Query: Contribution to Collective Work. 1990.

Dyfyniad MLA

In Answer to Your Query: Contribution to Collective Work. 1990.

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