Do unexpected panic attacks occur spontaneously?

MLA

Meuret, Alicia E., et al. “Do Unexpected Panic Attacks Occur Spontaneously?” Biological Psychiatry, vol. 70, no. 10, Nov. 2011, pp. 985–91. EBSCOhost, https://doi.org/10.1016/j.biopsych.2011.05.027.

APA

Meuret, A. E., Rosenfield, D., Wilhelm, F. H., Zhou, E., Conrad, A., Ritz, T., & Roth, W. T. (2011). Do unexpected panic attacks occur spontaneously? Biological Psychiatry, 70(10), 985–991. https://doi.org/10.1016/j.biopsych.2011.05.027

Chicago

Meuret, Alicia E, David Rosenfield, Frank H Wilhelm, Enlu Zhou, Ansgar Conrad, Thomas Ritz, and Walton T Roth. 2011. “Do Unexpected Panic Attacks Occur Spontaneously?” Biological Psychiatry 70 (10): 985–91. doi:10.1016/j.biopsych.2011.05.027.