Gaya APA
Riyanto, . (2012).
Serba gratis E-mail,messenger,bloging,domain.hosting,SMS for blog dan E-Commerce .
Yogyakarta:
Gava media.
Gaya MLA
Riyanto, .
"Serba gratis E-mail,messenger,bloging,domain.hosting,SMS for blog dan E-Commerce".
Yogyakarta:
Gava media,
2012.
Printed Book.