Gaya APA
Howard, V., Ishak, Z. (2014).
Rahasia Kekuatan Mental : how to use full power of mind .
Yogyakarta:
Bright Publisher.
Gaya MLA
Howard, Vernon., Ishak, Zulkarnen.
"Rahasia Kekuatan Mental : how to use full power of mind".
Yogyakarta:
Bright Publisher,
2014.
Text.