Gaya APA
Walking: for fitness and health. (1997).
New York:
Sterling Publishing Co..
Gaya Chicago
Walking: for fitness and health.
.
New York:
Sterling Publishing Co.,
1997.
Buku.
Gaya MLA
Walking: for fitness and health.
.
New York:
Sterling Publishing Co.,
1997.
Buku.
Gaya Turabian
Walking: for fitness and health.
New York:
Sterling Publishing Co.,
1997.
Buku.