Gaya APA
Principles of guidance. (1979).
New England:
[s.n.].
Gaya Chicago
Principles of guidance.
Ed.6.
New England:
[s.n.],
1979.
Text.
Gaya MLA
Principles of guidance.
Ed.6.
New England:
[s.n.],
1979.
Text.
Gaya Turabian
Principles of guidance.
New England:
[s.n.],
1979.
Print.