Cita APA (7th ed.)

ebrary, Inc, Mangen, D. J., & Peterson, W. A. (1984). Research instruments in social gerontology. University of Minnesota Press.

Cita Chicago (17th ed.)

ebrary, Inc, David J. Mangen, i Warren A. Peterson. Research Instruments in Social Gerontology. Minneapolis, MN: University of Minnesota Press, 1984.

Cita MLA (9th ed.)

ebrary, Inc, et al. Research Instruments in Social Gerontology. University of Minnesota Press, 1984.