APA (7th ed.) Citation

Leedy, P. D., Ormrod, J. E., & Johnson, L. R. (2019). Practical research: Planning and design (Twelfth edition.). Pearson.

Chicago Style (17th ed.) Citation

Leedy, Paul D., Jeanne Ellis Ormrod, and Laura Ruth Johnson. Practical Research: Planning and Design. Twelfth edition. NY, NY: Pearson, 2019.

MLA (9th ed.) Citation

Leedy, Paul D., et al. Practical Research: Planning and Design. Twelfth edition. Pearson, 2019.