Gaya APA
Payne, James S., Patton, James R.. (1981).
Mental retardation .
USA:
Bell & Howell Company.
Gaya Chicago
Payne, James S., Patton, James R..
Mental retardation.
USA:
Bell & Howell Company,
1981.
Text.
Gaya MLA
Payne, James S., Patton, James R..
Mental retardation.
USA:
Bell & Howell Company,
1981.
Text.
Gaya Turabian
Payne, James S., Patton, James R..
Mental retardation.
USA:
Bell & Howell Company,
1981.
Print.