APA
orr j., boyer r., . (2002). dot to dot numbers. us: school zone.
Chicago
orr julie, boyer robin(illustrated), . 2002. dot to dot numbers. us: school zone.
Harvard
orr j., boyer r., . (2002). dot to dot numbers. us: school zone.
MLA
orr julie, boyer robin(illustrated), . dot to dot numbers. us: school zone. 2002.