Citazione APA

Unzer, J. A., Prochaska, G., & Laycock, T. (1851). The principles of physiology. Sydenham Society.

Stile di citazione Chicago

Unzer, Johann August, Georg Prochaska, e Thomas Laycock. The Principles of Physiology. London: Sydenham Society, 1851.

Citazione MLA

Unzer, Johann August, et al. The Principles of Physiology. Sydenham Society, 1851.