Gaya APA
Permainan Softball. (2009).
796.5SOF P:
Ricardo.
Gaya Chicago
Permainan Softball.
Cet 1.
796.5SOF P:
Ricardo,
2009.
Buku Teks.
Gaya MLA
Permainan Softball.
Cet 1.
796.5SOF P:
Ricardo,
2009.
Buku Teks.
Gaya Turabian
Permainan Softball.
796.5SOF P:
Ricardo,
2009.
Buku Teks.