Gaya APA
Susilo, W.
(2014).
Ego CapitalrnHuman Capital Management Series
.
Yogyakarta:
AndiOffsit.
Gaya MLA
Susilo, Willy.
"Ego CapitalrnHuman Capital Management Series".
Yogyakarta:
AndiOffsit,
2014.
Buku PSI.