Cita APA (7a ed.)

Hedrick, T. E. (1993). Applied research design: A practical guide. Sage.

Cita Chicago Style (17a ed.)

Hedrick, Terry E. Applied Research Design: A Practical Guide. Newbury Park, California: Sage, 1993.

Cita MLA (9a ed.)

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