Keany, M. (1981). Earth Science laboratory/activity book: Annotated teacher's edition. Prentice Hall.
Chicago-čujuhus (17. p.)Keany, Michael. Earth Science Laboratory/activity Book: Annotated Teacher's Edition. Prentice Hall, 1981.
MLA-čujuhus (9. p.)Keany, Michael. Earth Science Laboratory/activity Book: Annotated Teacher's Edition. Prentice Hall, 1981.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.