Παραπομπή APA

Humble, J. (1971). Management by objectives: The programmed text. McGraw Hill.

Παραπομπή Chicago Style

Humble, John. Management by Objectives: The Programmed Text. London: McGraw Hill, 1971.

Παραπομπή MLA

Humble, John. Management by Objectives: The Programmed Text. McGraw Hill, 1971.