Gaya APA
Fontana, V, G, A.
(2011).
Lean Six Sigma
.
Bogor:
Vinchristo Publication.
Gaya MLA
Fontana, Vincent, Gaspersz;, Avanti.
"Lean Six Sigma".
Bogor:
Vinchristo Publication,
2011.
Buku Teknik Sipil.