APA (7th ed.) Citation

Gall, M. D., Borg, W. R., & Gall, J. P. (1996). Educational research: An introduction (6η έκδ.). Longman.

Chicago Style (17th ed.) Citation

Gall, Meredith D., Walter R. Borg, and Joyce P. Gall. Educational Research: An Introduction. 6η έκδ. White Plains: Longman, 1996.

MLA (8th ed.) Citation

Gall, Meredith D., et al. Educational Research: An Introduction. 6η έκδ. Longman, 1996.