Letters.

MLA

Medici, John, et al. “Letters.” Rocks & Minerals, vol. 94, no. 5, Sept. 2019, pp. 401–03. EBSCOhost, https://doi.org/10.1080/00357529.2019.1619132.

APA

Medici, J., Lafler, R., Clifford, J. H., White, J. S., Muntyan, B., & Cairncross, B. (2019). Letters. Rocks & Minerals, 94(5), 401–403. https://doi.org/10.1080/00357529.2019.1619132

Chicago

Medici, John, Renata Lafler, Janet H. Clifford, John S. White, Barbara Muntyan, and Bruce Cairncross. 2019. “Letters.” Rocks & Minerals 94 (5): 401–3. doi:10.1080/00357529.2019.1619132.