Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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