Keany, M. (1981). Earth Science laboratory/activity book: Annotated teacher's edition. Prentice Hall.
Citazione stile Chigago Style (17a edizione)Keany, Michael. Earth Science Laboratory/activity Book: Annotated Teacher's Edition. Prentice Hall, 1981.
Citatione MLA (9a ed.)Keany, Michael. Earth Science Laboratory/activity Book: Annotated Teacher's Edition. Prentice Hall, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.