Dyfyniad APA

National Council for Voluntary Organisations (Great Britain). (1999). The Voluntary agencies directory, 1999 (18th ed.). NCVO Publications.

Dyfyniad Arddull Chicago

National Council for Voluntary Organisations (Great Britain). The Voluntary Agencies Directory, 1999. 18th ed. London: NCVO Publications, 1999.

Dyfyniad MLA

National Council for Voluntary Organisations (Great Britain). The Voluntary Agencies Directory, 1999. 18th ed. NCVO Publications, 1999.

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