Παραπομπή APA

Vijayakumar, G. (1990). Performance appraisal. Discovery publishing house.

Παραπομπή Chicago Style

Vijayakumar, G.V.V. Performance Appraisal. New Delhi: Discovery publishing house, 1990.

Παραπομπή MLA

Vijayakumar, G.V.V. Performance Appraisal. Discovery publishing house, 1990.