Gaya APA
Ryadi, Slamet. (1982).
Public Health Publications .
Surabaya:
Usana Offset.
Gaya Chicago
Ryadi, Slamet.
Public Health Publications.
Surabaya:
Usana Offset,
1982.
Text.
Gaya MLA
Ryadi, Slamet.
Public Health Publications.
Surabaya:
Usana Offset,
1982.
Text.
Gaya Turabian
Ryadi, Slamet.
Public Health Publications.
Surabaya:
Usana Offset,
1982.
Print.