APA Citatie

Kral, T. (2005). Discover America ( An integrated skills text for intermadiate / Advanced students of English as a foreign language ). Washington D.C: United States Department of State.

Chicago Style citaat

Kral, Thomas. Discover America ( An Integrated Skills Text for Intermadiate / Advanced Students of English As a Foreign Language ). Washington D.C: United States Department of State, 2005.

MLA citatie

Kral, Thomas. Discover America ( An Integrated Skills Text for Intermadiate / Advanced Students of English As a Foreign Language ). Washington D.C: United States Department of State, 2005.