APA

Vaughans S. C., . (2000). Half empty half full. New York: Harcourt.

Chicago

Vaughans Susan C, . 2000. Half empty half full. New York: Harcourt.

Harvard

Vaughans S. C., . (2000). Half empty half full. New York: Harcourt.

MLA

Vaughans Susan C, . Half empty half full. New York: Harcourt. 2000.