Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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