Piper, M. K. (1977). Attitudes toward science: Investigations. ERIC.
Chicago-čujuhus (17. p.)Piper, Martha K. Attitudes Toward Science: Investigations. Ohio, Estados Unidos: ERIC, 1977.
MLA-čujuhus (9. p.)Piper, Martha K. Attitudes Toward Science: Investigations. ERIC, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.