APA

sobol r., . (2004). AN Elephant in the back yard. new york: dutton children's books.

Chicago

sobol richard, . 2004. AN Elephant in the back yard. new york: dutton children's books.

Harvard

sobol r., . (2004). AN Elephant in the back yard. new york: dutton children's books.

MLA

sobol richard, . AN Elephant in the back yard. new york: dutton children's books. 2004.