APA

Billett R. O., . (1970). Improving the secondary-school curriculum: a guide to effective curriculum planning. New York: [Teachers Practical Press]; distributed by Atherton Press.

Chicago

Billett Roy Oren, . 1970. Improving the secondary-school curriculum: a guide to effective curriculum planning. New York: [Teachers Practical Press]; distributed by Atherton Press.

Harvard

Billett R. O., . (1970). Improving the secondary-school curriculum: a guide to effective curriculum planning. New York: [Teachers Practical Press]; distributed by Atherton Press.

MLA

Billett Roy Oren, . Improving the secondary-school curriculum: a guide to effective curriculum planning. New York: [Teachers Practical Press]; distributed by Atherton Press. 1970.