APA-referens (7:e uppl.)

Hover, D. Think twice. Communication activities for beginner to intermediate students.

Chicago-referens (17:e uppl.)

Hover, David. Think Twice. Communication Activities for Beginner to Intermediate Students.

MLA-referens (8:e uppl.)

Hover, David. Think Twice. Communication Activities for Beginner to Intermediate Students.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.