Gaya APA
Howard, V. (2014).
Rahasia Kekuatan Mental ; How To Use Full Power Of Mind .
Sleman Yogyakarta:
Bright Publisher.
Gaya MLA
Howard, Vernon.
"Rahasia Kekuatan Mental ; How To Use Full Power Of Mind".
Sleman Yogyakarta:
Bright Publisher,
2014.
Text.