Fraenkel, J. R., & Wallen, N. E. (2019). How to design and evaluate research in education. McGraw-Hill.
Chicago-čujuhus (17. p.)Fraenkel, Jack R., juo Norman E. Wallen. How to Design and Evaluate Research in Education. Boston: McGraw-Hill, 2019.
MLA-čujuhus (9. p.)Fraenkel, Jack R., juo Norman E. Wallen. How to Design and Evaluate Research in Education. McGraw-Hill, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.