Gaya APA

Schulz, K, F., A.Grimes, D. (2006). The Lancet. Handbook of essential Concepts in Clinical Research (Ed.1). USA: Elsevier Ltd.

Gaya MLA

Schulz, Kenneth, F.., A.Grimes, David. "The Lancet. Handbook of essential Concepts in Clinical Research". Ed.1 USA: Elsevier Ltd, 2006. Text.