Strutt P. Peter. (2005). Power House. An Upper Intermediate Busines English course: Study Book. Harlow, Longman, 2005.
Chicago-referens (17:e uppl.)Strutt P. Peter. Power House. An Upper Intermediate Busines English Course: Study Book. Harlow, Longman, 2005, 2005.
MLA-referens (9:e uppl.)Strutt P. Peter. Power House. An Upper Intermediate Busines English Course: Study Book. Harlow, Longman, 2005, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.