Dyfyniad APA

Bell, D. (1967). Toward the year 2000: Work in progress. Boston: Beacon Press.

Dyfyniad Arddull Chicago

Bell, Daniel. Toward the Year 2000: Work in Progress. Boston: Beacon Press, 1967.

Dyfyniad MLA

Bell, Daniel. Toward the Year 2000: Work in Progress. Boston: Beacon Press, 1967.

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