Gaya APA
To Be A Great Leader. (2017).
Yogyakarta:
Andi.
Gaya Chicago
To Be A Great Leader.
.
Yogyakarta:
Andi,
2017.
Buku.
Gaya MLA
To Be A Great Leader.
.
Yogyakarta:
Andi,
2017.
Buku.
Gaya Turabian
To Be A Great Leader.
Yogyakarta:
Andi,
2017.
Buku.