APA

Webb Marion St John, . (1994). Knock three times!. Ware: Wordsworth.

Chicago

Webb Marion St John, . 1994. Knock three times!. Ware: Wordsworth.

Harvard

Webb Marion St John, . (1994). Knock three times!. Ware: Wordsworth.

MLA

Webb Marion St John, . Knock three times!. Ware: Wordsworth. 1994.