Παραπομπή APA

Kallen, A. (2011). Understanding biostatistics. John Wiley & Sons.

Παραπομπή Chicago Style

Kallen, Anders. Understanding Biostatistics. United Kingdom: John Wiley & Sons, 2011.

Παραπομπή MLA

Kallen, Anders. Understanding Biostatistics. John Wiley & Sons, 2011.