Gaya APA
Niven, David. (2000).
The 100 Simple Secrets of Happy People .
San Fransisco:
Holt Paperback.
Gaya Chicago
Niven, David.
The 100 Simple Secrets of Happy People.
San Fransisco:
Holt Paperback,
2000.
Text.
Gaya MLA
Niven, David.
The 100 Simple Secrets of Happy People.
San Fransisco:
Holt Paperback,
2000.
Text.
Gaya Turabian
Niven, David.
The 100 Simple Secrets of Happy People.
San Fransisco:
Holt Paperback,
2000.
Print.