APA

Portney L. G., Watkins M. P., . (2000). Foundations of clinical research. New Jersey: Prentice Hall Health.

Chicago

Portney Leslie Gross, Watkins Mary P, . 2000. Foundations of clinical research. New Jersey: Prentice Hall Health.

Harvard

Portney L. G., Watkins M. P., . (2000). Foundations of clinical research. New Jersey: Prentice Hall Health.

MLA

Portney Leslie Gross, Watkins Mary P, . Foundations of clinical research. New Jersey: Prentice Hall Health. 2000.