APA-viite (7. p.)
HARLEY, R., & ET AL. (1994). THE DEVELOPMENT OF PROGRAMMED INSTRUCTION IN ORIENTATION AND MOBILITY FOR AGED BLIND ADULTS.
Chicago-viite (17. p.)
HARLEY, R.K, ja ET AL. THE DEVELOPMENT OF PROGRAMMED INSTRUCTION IN ORIENTATION AND MOBILITY FOR AGED BLIND ADULTS. 1994.
MLA-viite (9. p.)
HARLEY, R.K, ja ET AL. THE DEVELOPMENT OF PROGRAMMED INSTRUCTION IN ORIENTATION AND MOBILITY FOR AGED BLIND ADULTS. 1994.
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