Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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