Gaya APA

Zimmermann, H., Rahlfs, V, W. (2014). Comments on number-needed-to-treat derived from ordinal scales (2014, Vol. 23(1)). London: SAGE.

Gaya MLA

Zimmermann, Helmuth., Rahlfs, Volker, W. "Comments on number-needed-to-treat derived from ordinal scales". 2014, Vol. 23(1) London: SAGE, 2014. e-journal.