APA ציטוט

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

Chicago Style (17th ed.) Citation

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

ציטוט MLA

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