APA

SMOOTHEY M., . (1995). LETS INVESTIGATE GRAPHS. NEW YORK: MARSHALL CAVENDISH.

Chicago

SMOOTHEY MARION, . 1995. LETS INVESTIGATE GRAPHS. NEW YORK: MARSHALL CAVENDISH.

Harvard

SMOOTHEY M., . (1995). LETS INVESTIGATE GRAPHS. NEW YORK: MARSHALL CAVENDISH.

MLA

SMOOTHEY MARION, . LETS INVESTIGATE GRAPHS. NEW YORK: MARSHALL CAVENDISH. 1995.