Gaya APA

Natusch, D. (2012). Equianalgesic doses of opioids their use in clinical practice ((2012), 6(1)). : SAGE, British Journal of Pain.

Gaya MLA

Natusch, Douglas. "Equianalgesic doses of opioids their use in clinical practice". (2012), 6(1) : SAGE, British Journal of Pain, 2012. e-journal.