Cita APA (7th ed.)

Hurd, P. D. H. (1969). New directions in teaching secondary school science. Rand McNally.

Cita Chicago (17th ed.)

Hurd, Paul De Hart. New Directions in Teaching Secondary School Science. Chicago: Rand McNally, 1969.

Cita MLA (8th ed.)

Hurd, Paul De Hart. New Directions in Teaching Secondary School Science. Rand McNally, 1969.