Gaya APA
Siregar, Suryadi. (2012).
Mekanika Benda Langit (AS 3102) .
Bandung:
ITB Press.
Gaya Chicago
Siregar, Suryadi.
Mekanika Benda Langit (AS 3102).
Bandung:
ITB Press,
2012.
Diktat.
Gaya MLA
Siregar, Suryadi.
Mekanika Benda Langit (AS 3102).
Bandung:
ITB Press,
2012.
Diktat.
Gaya Turabian
Siregar, Suryadi.
Mekanika Benda Langit (AS 3102).
Bandung:
ITB Press,
2012.
Diktat.