Cita APA

Johnson, B., & Christensen, L. B. (2012). Educational research (4th ed.). SAGE Publications.

Chicago Edition Citation

Johnson, Burke, i Larry B. Christensen. Educational Research. 4th ed. Thousand Oaks, Calif.: SAGE Publications, 2012.

Cita MLA

Johnson, Burke, i Larry B. Christensen. Educational Research. 4th ed. SAGE Publications, 2012.