Cita APA (7th ed.)

Edwards, A. J. (2004). ISO 14001 environmental certification step by step (Revised 1st ed.). Elsevier Butterworth-Heinemann.

Cita Chicago (17th ed.)

Edwards, A. J. ISO 14001 Environmental Certification Step by Step. Revised 1st ed. Oxford: Elsevier Butterworth-Heinemann, 2004.

Cita MLA (9th ed.)

Edwards, A. J. ISO 14001 Environmental Certification Step by Step. Revised 1st ed. Elsevier Butterworth-Heinemann, 2004.