APA

URY W., . (2004). The Power of A Positive No. USA: bontam books.

Chicago

URY William, . 2004. The Power of A Positive No. USA: bontam books.

Harvard

URY W., . (2004). The Power of A Positive No. USA: bontam books.

MLA

URY William, . The Power of A Positive No. USA: bontam books. 2004.