Cita APA (7th ed.)

BUTTLE, J. (1981). Chemistry, a unified approach. Butterworths.

Cita Chicago (17th ed.)

BUTTLE, J.W. Chemistry, a Unified Approach. London: Butterworths, 1981.

Cita MLA (9th ed.)

BUTTLE, J.W. Chemistry, a Unified Approach. Butterworths, 1981.