Gagné, R. M. (1974). Essentials of learning for instruction. Dryden.
Chicago-čujuhus (17. p.)Gagné, Robert Mills. Essentials of Learning for Instruction. Hinsdale: Dryden, 1974.
MLA-čujuhus (9. p.)Gagné, Robert Mills. Essentials of Learning for Instruction. Dryden, 1974.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.