Gaya APA
The Personal Problem Solver. (1977).
Englewood Cliffs:
prentice-hall.
Gaya Chicago
The Personal Problem Solver.
~.
Englewood Cliffs:
prentice-hall,
1977.
Buku.
Gaya MLA
The Personal Problem Solver.
~.
Englewood Cliffs:
prentice-hall,
1977.
Buku.
Gaya Turabian
The Personal Problem Solver.
Englewood Cliffs:
prentice-hall,
1977.
Buku.