Howard, V. (2018). Rahasia Kekuatan Mental. Bright Publisher.
Chicago Style (17th ed.) CitationHoward, Vernon. Rahasia Kekuatan Mental. Bright Publisher, 2018.
MLA (8th ed.) CitationHoward, Vernon. Rahasia Kekuatan Mental. Bright Publisher, 2018.
Warning: These citations may not always be 100% accurate.