APA
PGMS, . (1990). Spinal orthotics. [Place of publication not identified]: Post Graduate Medical School.
Chicago
PGMS, . 1990. Spinal orthotics. [Place of publication not identified]: Post Graduate Medical School.
Harvard
PGMS, . (1990). Spinal orthotics. [Place of publication not identified]: Post Graduate Medical School.
MLA
PGMS, . Spinal orthotics. [Place of publication not identified]: Post Graduate Medical School. 1990.