(1968). Phases of matter: A science unit for the upper elementary grades ; teacher's guide (Trial ed.). Science Curriculum Improvement Study.
Citazione stile Chigago Style (17a edizione)Phases of Matter: A Science Unit for the Upper Elementary Grades ; Teacher's Guide. Trial ed. Berkeley, CA: Science Curriculum Improvement Study, 1968.
Citatione MLA (9a ed.)Phases of Matter: A Science Unit for the Upper Elementary Grades ; Teacher's Guide. Trial ed. Science Curriculum Improvement Study, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.