Gaya APA
Shepherd, Peter. (2009).
The Positive Approach .
Yogyakarta:
Rumpun.
Gaya Chicago
Shepherd, Peter.
The Positive Approach.
Yogyakarta:
Rumpun,
2009.
Text.
Gaya MLA
Shepherd, Peter.
The Positive Approach.
Yogyakarta:
Rumpun,
2009.
Text.
Gaya Turabian
Shepherd, Peter.
The Positive Approach.
Yogyakarta:
Rumpun,
2009.
Print.