APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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