Παραπομπή APA

Holt, M., & Marjoram, D. T. E. (1973). Mathematics in a changing world. Heinemann Educational.

Παραπομπή Chicago Style

Holt, Michael, και D T E. Marjoram. Mathematics in a Changing World. London: Heinemann Educational, 1973.

Παραπομπή MLA

Holt, Michael, και D T E. Marjoram. Mathematics in a Changing World. Heinemann Educational, 1973.