Dyfyniad APA

Hedrick, T. E., Bickman, L., & Rog, D. J. (1993). Applied research design: A practical guide. Sage Publications.

Dyfyniad Arddull Chicago

Hedrick, Terry E., Leonard Bickman, and Debra J. Rog. Applied Research Design: A Practical Guide. Newbury Park: Sage Publications, 1993.

Dyfyniad MLA

Hedrick, Terry E., et al. Applied Research Design: A Practical Guide. Sage Publications, 1993.

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