एपीए उद्धरण

Dubicka, I., & O'Keeffe, M. (2013). English for international tourism: Pre-Intermediate coursebook. England: Pearson.

शिकागो स्टाइल उद्धरण

Dubicka, Iwonna, और Margaret O'Keeffe. English for International Tourism: Pre-Intermediate Coursebook. England: Pearson, 2013.

एमएलए उद्धरण

Dubicka, Iwonna, और Margaret O'Keeffe. English for International Tourism: Pre-Intermediate Coursebook. England: Pearson, 2013.