Gaya APA
Fritz, R. (2009).
The Power Of a Positive Attitude: Kunci Kesuksesan Sejati Anda .
Jakarta:
Gramedia Pustaka Utama.
Gaya MLA
Fritz, Roger.
"The Power Of a Positive Attitude: Kunci Kesuksesan Sejati Anda".
Jakarta:
Gramedia Pustaka Utama,
2009.
Text.