Gaya APA
Martens, R., Julie, I, M. (2011).
Complete guide to slowpitch softball .
Illinois:
Illinois: Human Kinetics, 2011.
Gaya MLA
Martens, Rainer., Julie, I., Martens,.
"Complete guide to slowpitch softball".
Illinois:
Illinois: Human Kinetics, 2011,
2011.
.