Gaya APA

Ratanawijitrasin, S., Wondemagegnehu, E. (2002). Effective drug regulation. A multicountry study . Geneva: World Health Organization.

Gaya MLA

Ratanawijitrasin, Sauwakon., Wondemagegnehu, Eshetu. "Effective drug regulation. A multicountry study". Geneva: World Health Organization, 2002. print.