Gaya APA
Purwoko, Herudjati. (1999).
STEPPING STONE (1 ed).
Solo:
Crown publishers.
Gaya Chicago
Purwoko, Herudjati.
STEPPING STONE.
1 ed
Solo:
Crown publishers,
1999.
Nonfiksi.
Gaya MLA
Purwoko, Herudjati.
STEPPING STONE.
1 ed
Solo:
Crown publishers,
1999.
Nonfiksi.
Gaya Turabian
Purwoko, Herudjati.
STEPPING STONE.
1 ed
Solo:
Crown publishers,
1999.
Nonfiksi.