APA引文

Persson, B., Werdelin, I., & Wilmo, K. (1968). Experimental studies of the use of abstract and concrete concepts in problem solving. Department of Educational and Psychological Research, School of Education.

Chicago Style (17th ed.) Citation

Persson, B., I. Werdelin, and K. Wilmo. Experimental Studies of the Use of Abstract and Concrete Concepts in Problem Solving. Malmo, Sweden: Department of Educational and Psychological Research, School of Education, 1968.

MLA引文

Persson, B., et al. Experimental Studies of the Use of Abstract and Concrete Concepts in Problem Solving. Department of Educational and Psychological Research, School of Education, 1968.