APA

Foreman Peter, . (19). The mystery of allegra. [S.l: s.n.].

Chicago

Foreman Peter, . 19. The mystery of allegra. [S.l: s.n.].

Harvard

Foreman Peter, . (19). The mystery of allegra. [S.l: s.n.].

MLA

Foreman Peter, . The mystery of allegra. [S.l: s.n.]. 19.