Ridder, J. A., & Friese, A. V. (1748). Observationem rariorem de foetv septem annorvm per intestinvm rectvm matre salva et svperstite exclvso cvm doctis commvnicat Ioannes Avgvstvs Ridder, med. doct. Annabergae: Ex officina Avg. Valent. Frisii.
Chicago Style CitationRidder, Johann August, and August Valentin Friese. Observationem Rariorem De Foetv Septem Annorvm Per Intestinvm Rectvm Matre Salva Et Svperstite Exclvso Cvm Doctis Commvnicat Ioannes Avgvstvs Ridder, Med. Doct. Annabergae: Ex officina Avg. Valent. Frisii, 1748.
MLA CitationRidder, Johann August, and August Valentin Friese. Observationem Rariorem De Foetv Septem Annorvm Per Intestinvm Rectvm Matre Salva Et Svperstite Exclvso Cvm Doctis Commvnicat Ioannes Avgvstvs Ridder, Med. Doct. Annabergae: Ex officina Avg. Valent. Frisii, 1748.