Ory, J., C., & Ryan, K. (1993). Tips for improving testing and grading(v.4). Sage Publications.
Chicago Style aipamenaOry, John, C., and Katherine Ryan. Tips for Improving Testing and Grading(v.4). Newbury Park: Sage Publications, 1993.
MLA aipamenaOry, John, C., and Katherine Ryan. Tips for Improving Testing and Grading(v.4). Sage Publications, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.