Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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

Atenció: Aquestes cites poden no estar 100% correctes.