Gaya APA
Graham, Billy. (1985).
The Secret of Happiness .
Texas:
Word Books Publisher.
Gaya Chicago
Graham, Billy.
The Secret of Happiness.
Texas:
Word Books Publisher,
1985.
Text.
Gaya MLA
Graham, Billy.
The Secret of Happiness.
Texas:
Word Books Publisher,
1985.
Text.
Gaya Turabian
Graham, Billy.
The Secret of Happiness.
Texas:
Word Books Publisher,
1985.
Print.