Dyfyniad APA

Unesco. Social Science Documentation Centre. (1990). World directory of social science institutions: Research, advanced training, documentation, professional bodies (5th ed.). Unesco.

Dyfyniad Arddull Chicago

Unesco. Social Science Documentation Centre. World Directory of Social Science Institutions: Research, Advanced Training, Documentation, Professional Bodies. 5th ed. Paris: Unesco, 1990.

Dyfyniad MLA

Unesco. Social Science Documentation Centre. World Directory of Social Science Institutions: Research, Advanced Training, Documentation, Professional Bodies. 5th ed. Unesco, 1990.

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