Cita APA (7th ed.)

Fritsch, E. C. (1955). Science teaching aids for a stronger America. s.n.

Cita Chicago (17th ed.)

Fritsch, Emery C. Science Teaching Aids for a Stronger America. Illinois: s.n, 1955.

Cita MLA (9th ed.)

Fritsch, Emery C. Science Teaching Aids for a Stronger America. s.n, 1955.