APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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