Vargas, S. R. (1990). The effect of the controlled and free grouping schemes in the achievement in basic science process skills in high school physics laboratory activities. Animo Repository.
استشهاد بنمط شيكاغوVargas, Sonia R. The Effect of the Controlled and Free Grouping Schemes in the Achievement in Basic Science Process Skills in High School Physics Laboratory Activities. Animo Repository, 1990.
MLA استشهادVargas, Sonia R. The Effect of the Controlled and Free Grouping Schemes in the Achievement in Basic Science Process Skills in High School Physics Laboratory Activities. Animo Repository, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.