APA

Clark M. H., . (1989). While my pretty one sleeps. London: Century.

Chicago

Clark Mary Higgins, . 1989. While my pretty one sleeps. London: Century.

Harvard

Clark M. H., . (1989). While my pretty one sleeps. London: Century.

MLA

Clark Mary Higgins, . While my pretty one sleeps. London: Century. 1989.