APA (7th ed.) Citation

Engvold, O., & Zirker, J. B. (2016). The parallel worlds of Christoph Scheiner and Galileo Galilei.

Chicago Style (17th ed.) Citation

Engvold, Oddbjørn, and Jack B. Zirker. The Parallel Worlds of Christoph Scheiner and Galileo Galilei. 2016.

MLA (9th ed.) Citation

Engvold, Oddbjørn, and Jack B. Zirker. The Parallel Worlds of Christoph Scheiner and Galileo Galilei. 2016.

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