APA (7th ed.) Citation

(1968). Phases of matter: A science unit for the upper elementary grades ; teacher's guide (Trial ed.). Science Curriculum Improvement Study.

Chicago Style (17th ed.) Citation

Phases of Matter: A Science Unit for the Upper Elementary Grades ; Teacher's Guide. Trial ed. Berkeley, CA: Science Curriculum Improvement Study, 1968.

MLA (9th ed.) Citation

Phases of Matter: A Science Unit for the Upper Elementary Grades ; Teacher's Guide. Trial ed. Science Curriculum Improvement Study, 1968.