Gaya APA
Unruh, Gregory. (2010).
Earth, Inc : Using nature's rules to build sustainable profits .
America:
hardvard businiess press.
Gaya Chicago
Unruh, Gregory.
Earth, Inc : Using nature's rules to build sustainable profits.
America:
hardvard businiess press,
2010.
Buku.
Gaya MLA
Unruh, Gregory.
Earth, Inc : Using nature's rules to build sustainable profits.
America:
hardvard businiess press,
2010.
Buku.
Gaya Turabian
Unruh, Gregory.
Earth, Inc : Using nature's rules to build sustainable profits.
America:
hardvard businiess press,
2010.
Buku.