Cita APA (7th ed.)

(1963). Material objects: A science unit for primary grades ; teacher's manual (Trial ed.). Science Curriculum Improvement Study.

Cita Chicago (17th ed.)

Material Objects: A Science Unit for Primary Grades ; Teacher's Manual. Trial ed. Berkeley, CA: Science Curriculum Improvement Study, 1963.

Cita MLA (9th ed.)

Material Objects: A Science Unit for Primary Grades ; Teacher's Manual. Trial ed. Science Curriculum Improvement Study, 1963.