APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.