Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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