APA Style
Christensen, C. et al
(2015).
Closing: 5 keterampilan keberhasilan penjualan
.
Bandung:
Dunamis Publishing.
MLA Style
Christensen, Craig. et al.
"Closing: 5 keterampilan keberhasilan penjualan".
Bandung:
Dunamis Publishing,
2015.
Books.