APA

Swain C., Speirs J., . (2012). Cliff. Pelham, New York: Benchmark Education Co.

Chicago

Swain Cynthia, Speirs John, . 2012. Cliff. Pelham, New York: Benchmark Education Co.

Harvard

Swain C., Speirs J., . (2012). Cliff. Pelham, New York: Benchmark Education Co.

MLA

Swain Cynthia, Speirs John, . Cliff. Pelham, New York: Benchmark Education Co. 2012.