Citazione Stile APA (7a Edizione)

Bergstedt, J. (2015). English first language (1. publ.). Pearson Education Namibia.

Citazione stile Chigago Style (17a edizione)

Bergstedt, J. English First Language. 1. publ. Windhoek: Pearson Education Namibia, 2015.

Citatione MLA (9a ed.)

Bergstedt, J. English First Language. 1. publ. Pearson Education Namibia, 2015.