Cita APA (7th ed.)

BERNTHAL, M. S. (2009). BARNEY'S BOOK OF SHAPES.

Cita Chicago (17th ed.)

BERNTHAL, MARK. S. BARNEY'S BOOK OF SHAPES. 2009.

Cita MLA (9th ed.)

BERNTHAL, MARK. S. BARNEY'S BOOK OF SHAPES. 2009.