Dyfyniad APA

Rollnik, H., & Pfeil, W. (1974). Proceedings. North-Holland Publishing Company.

Dyfyniad Arddull Chicago

Rollnik, H., and W. Pfeil. Proceedings. Amsterdam: North-Holland Publishing Company, 1974.

Dyfyniad MLA

Rollnik, H., and W. Pfeil. Proceedings. North-Holland Publishing Company, 1974.

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