Gaya APA
Horton, Robert L.. (1975).
Programmed learning aid for social problems / Robert L. Horton .
:
London : Irwin-Dersey.
Gaya Chicago
Horton, Robert L..
Programmed learning aid for social problems / Robert L. Horton.
:
London : Irwin-Dersey,
1975.
Buku.
Gaya MLA
Horton, Robert L..
Programmed learning aid for social problems / Robert L. Horton.
:
London : Irwin-Dersey,
1975.
Buku.
Gaya Turabian
Horton, Robert L..
Programmed learning aid for social problems / Robert L. Horton.
:
London : Irwin-Dersey,
1975.
Buku.