Gaya APA
Berman, Saul Jay. (2011).
Not For Free : making money in the digital age .
America:
Harvard Business Press.
Gaya Chicago
Berman, Saul Jay.
Not For Free : making money in the digital age.
America:
Harvard Business Press,
2011.
Buku.
Gaya MLA
Berman, Saul Jay.
Not For Free : making money in the digital age.
America:
Harvard Business Press,
2011.
Buku.
Gaya Turabian
Berman, Saul Jay.
Not For Free : making money in the digital age.
America:
Harvard Business Press,
2011.
Buku.