Παραπομπή APA

Berkmans. (1978). Watch repairing. Kerala Bhasha Institute.

Παραπομπή Chicago Style

Berkmans. Watch Repairing. Thiruvananthapuram: Kerala Bhasha Institute, 1978.

Παραπομπή MLA

Berkmans. Watch Repairing. Kerala Bhasha Institute, 1978.