Παραπομπή APA

Gopalakrishnan, K. (1999). Inventors who revolutionised our lives. National Book Trust.

Παραπομπή Chicago Style

Gopalakrishnan, K.V. Inventors Who Revolutionised Our Lives. New Delhi: National Book Trust, 1999.

Παραπομπή MLA

Gopalakrishnan, K.V. Inventors Who Revolutionised Our Lives. National Book Trust, 1999.