Leedy, Paul D.

Practical research : = planning and design / by: Ertmer, Peggy A.; Leedy, Paul D.; Newby, Timothy J. (Language materials, printed)

實用研究方法論 : = 計劃與設計 / by: Leedy, Paul D.; 利迪 ((Leedy, Paul D.)); 歐姆羅德 ((Ormrod, Jeanne Ellis)); 牛冬梅; 陳國滬; Ormrod, Jeanne Ellis; 顧寶炎 (Language materials, printed)

Practical research : = planning and design / by: Leedy, Paul D. (Language materials, printed)