APA način citiranja (7. izdanje)

Gopalkrishnan , R. (2010). When The Penny Drops: Learning What Not Taught. Penguin.

Čikaški stil citiranja (17. izdanje)

Gopalkrishnan , R. When The Penny Drops: Learning What Not Taught. Delhi: Penguin, 2010.

MLA način citiranja (9. izdanje)

Gopalkrishnan , R. When The Penny Drops: Learning What Not Taught. Penguin, 2010.