APA Citation
Helwig, J. O. v., & Scheffer, M. (1680). D. JOH. OTTONIS HELBIGII, Med. Doct. INTROITVS IN VERAM ET INAUDITAM PHYSICAM DEFENSUS Per Epistolam Ad Generosissimum D. R. R. de St. &c. &c. Francofurti: [s.n.].
Chicago Style CitationHelwig, Johann O. von, and Matthias Scheffer. D. JOH. OTTONIS HELBIGII, Med. Doct. INTROITVS IN VERAM ET INAUDITAM PHYSICAM DEFENSUS Per Epistolam Ad Generosissimum D. R. R. De St. &c. &c. Francofurti: [s.n.], 1680.
MLA CitationHelwig, Johann O. von, and Matthias Scheffer. D. JOH. OTTONIS HELBIGII, Med. Doct. INTROITVS IN VERAM ET INAUDITAM PHYSICAM DEFENSUS Per Epistolam Ad Generosissimum D. R. R. De St. &c. &c. Francofurti: [s.n.], 1680.
Warning: These citations may not always be 100% accurate.