Cita APA (7th ed.)

Levinson, A. The mentally retarded child (Rev. ed.). Allen & Unwin, c1965.

Cita Chicago (17th ed.)

Levinson, Abraham. The Mentally Retarded Child. Rev. ed. London: Allen & Unwin, c1965.

Cita MLA (9th ed.)

Levinson, Abraham. The Mentally Retarded Child. Rev. ed. Allen & Unwin, c1965.