APA (7th ed.) Citation

Jones, P. R., & Cregan, A. (1986). Sign & symbol communication for mentally handicapped people / Philip R. Jones and Ailsa Cregan. Croom Helm.

Chicago Style (17th ed.) Citation

Jones, Philip R., and Ailsa Cregan. Sign & Symbol Communication for Mentally Handicapped People / Philip R. Jones and Ailsa Cregan. London: Croom Helm, 1986.

MLA (9th ed.) Citation

Jones, Philip R., and Ailsa Cregan. Sign & Symbol Communication for Mentally Handicapped People / Philip R. Jones and Ailsa Cregan. Croom Helm, 1986.

Warning: These citations may not always be 100% accurate.