APA (7th ed.) Citation

Gemma Frisius, R., & Schwertel, J. (1570). Arithmeticae Practicae Methodvs Facilis. [Ecvdebat Iohannes Schvvertel.].

Chicago Style (17th ed.) Citation

Gemma Frisius, Rainer, and Johann Schwertel. Arithmeticae Practicae Methodvs Facilis. VVitebergae: [Ecvdebat Iohannes Schvvertel.], 1570.

MLA (9th ed.) Citation

Gemma Frisius, Rainer, and Johann Schwertel. Arithmeticae Practicae Methodvs Facilis. [Ecvdebat Iohannes Schvvertel.], 1570.

Warning: These citations may not always be 100% accurate.