APA-čujuhus (7. p.)

Denham, C., & Lieberman, A. (1980). Time to learn. U.S. Department of education.

Chicago-čujuhus (17. p.)

Denham, Carolyn, juo Ann Lieberman. Time to Learn. California: U.S. Department of education, 1980.

MLA-čujuhus (9. p.)

Denham, Carolyn, juo Ann Lieberman. Time to Learn. U.S. Department of education, 1980.

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