APA Edition Citation

Sigel, L. E. A., & Hooper, F. H. (1968). Logical thinking in children: Research based on Piagets theory.

Chicago Edition Citation

Sigel, Lrving E. And, and Frank H. Hooper. Logical Thinking in Children: Research Based on Piagets Theory. 1968.

MLA Edition Citation

Sigel, Lrving E. And, and Frank H. Hooper. Logical Thinking in Children: Research Based on Piagets Theory. 1968.

Warning: These citations may not always be 100% accurate.