Gaya APA
Hean-Tatt, O. (1994).
Secrets of ancient Chinese art of motivation. .
Selangor Darul Ehsan:
Selangor Darul Ehsan Pelanduk Publications.
Gaya MLA
Hean-Tatt, Ong.
"Secrets of ancient Chinese art of motivation. ".
Selangor Darul Ehsan:
Selangor Darul Ehsan Pelanduk Publications,
1994.
Buku.