Παραπομπή APA

Humble, J. W. (1967). Improving business results (Mc graw hill series in management.). McGraw Hill.

Παραπομπή Chicago Style

Humble, John W. Improving Business Results. Mc graw hill series in management. England: McGraw Hill, 1967.

Παραπομπή MLA

Humble, John W. Improving Business Results. Mc graw hill series in management. McGraw Hill, 1967.