APA-čujuhus (7. p.)
Hillson, M., & Bongo, J. (1971). Continuous-progress education: A practical approach. Science Research Associates.
Chicago-čujuhus (17. p.)
Hillson, Maurie, juo Joseph Bongo. Continuous-progress Education: A Practical Approach. Palo Alto, Calif.: Science Research Associates, 1971.
MLA-čujuhus (9. p.)
Hillson, Maurie, juo Joseph Bongo. Continuous-progress Education: A Practical Approach. Science Research Associates, 1971.
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