Dyfyniad APA

Open University, Johnson, J., & Slater, R. (1993). Ageing and later life. Sage Publications.

Dyfyniad Arddull Chicago

Open University, Julia Johnson, and Robert Slater. Ageing and Later Life. London ; Thousand Oaks, Calif.: Sage Publications, 1993.

Dyfyniad MLA

Open University, et al. Ageing and Later Life. Sage Publications, 1993.

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