Cita APA (7a ed.)

Hemphill, L., Picardi, N., & Tager-Flusberg, H. (1991). Narrative as an index of communicative competence in mildly mentally retarded children. [s.n.].

Cita Chicago Style (17a ed.)

Hemphill, Lowry, Nancy Picardi, y Helen Tager-Flusberg. Narrative as an Index of Communicative Competence in Mildly Mentally Retarded Children. [S.l.]: [s.n.], 1991.

Cita MLA (9a ed.)

Hemphill, Lowry, et al. Narrative as an Index of Communicative Competence in Mildly Mentally Retarded Children. [s.n.], 1991.