Gaya APA

Riley, D, S. (2018). Materia Medica of New and Old Homeopathic Medicines (2nd ed. 2018). New york: Springer International Publishing.

Gaya MLA

Riley, David, S.. "Materia Medica of New and Old Homeopathic Medicines". 2nd ed. 2018 New york: Springer International Publishing, 2018. Text.