Cita APA (7a ed.)

Crellin, J. K., Philpott, J., & Bass, A. L. T. (1990). Trying to Give Ease: Tommie Bass and the Story of Herbal Medicine. Duke University Press.

Cita Chicago Style (17a ed.)

Crellin, J. K., Jane Philpott, y A. L. Tommie Bass. Trying to Give Ease: Tommie Bass and the Story of Herbal Medicine. Durham: Duke University Press, 1990.

Cita MLA (8a ed.)

Crellin, J. K., et al. Trying to Give Ease: Tommie Bass and the Story of Herbal Medicine. Duke University Press, 1990.