Cita APA (7th ed.)

BLASHFIELD, J. &. B. (1991). OIL SPILLS. CHILDRENS PRESS.

Cita Chicago (17th ed.)

BLASHFIELD, JEAN.F & BLACK. OIL SPILLS. USA: CHILDRENS PRESS, 1991.

Cita MLA (9th ed.)

BLASHFIELD, JEAN.F & BLACK. OIL SPILLS. CHILDRENS PRESS, 1991.