Monette, D. R., Sullivan, T. J., & DeJong, C. R. (1998). Applied social research: Tool for the human services (4th ed.). Harcourt Brace College Publishers.
Dyfyniad Arddull ChicagoMonette, Duane R., Thomas J. Sullivan, and Cornell R. DeJong. Applied Social Research: Tool for the Human Services. 4th ed. Fort Worth: Harcourt Brace College Publishers, 1998.
Dyfyniad MLAMonette, Duane R., et al. Applied Social Research: Tool for the Human Services. 4th ed. Harcourt Brace College Publishers, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.