Cita APA

Leedy, P. D., & Ormrod, J. E. (2001). Practical research (7th edition.). Upper Saddle River, N.J.: Merrill Prentice Hall.

Chicago Style Citation

Leedy, Paul D., i Jeanne Ellis Ormrod. Practical Research. 7th edition. Upper Saddle River, N.J.: Merrill Prentice Hall, 2001.

Cita MLA

Leedy, Paul D., i Jeanne Ellis Ormrod. Practical Research. 7th edition. Upper Saddle River, N.J.: Merrill Prentice Hall, 2001.