Gaya APA
Peale, N, V., Hery, .
(2011).
Power of Plus Factor = Kekuatan Faktor Plus
.
Yogyakarta:
Cinta Buku.
Gaya MLA
Peale, Norman, Vincent., Hery, .
"Power of Plus Factor = Kekuatan Faktor Plus".
Yogyakarta:
Cinta Buku,
2011.
Book.