Παραπομπή APA

Schen, E. (2013). Human inquiry: The gentle art of asking instead of telling.

Παραπομπή Chicago Style

Schen, Edgar. Human Inquiry: The Gentle Art of Asking Instead of Telling. Collins Business, 2013.

Παραπομπή MLA

Schen, Edgar. Human Inquiry: The Gentle Art of Asking Instead of Telling. 2013.