Παραπομπή APA

Gopalakrishnan, R. (2010). When the penny drops: Learning what's not taught. Portfolio.

Παραπομπή Chicago Style

Gopalakrishnan, R. When the Penny Drops: Learning What's Not Taught. New Delhi: Portfolio, 2010.

Παραπομπή MLA

Gopalakrishnan, R. When the Penny Drops: Learning What's Not Taught. Portfolio, 2010.