APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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