APA (7th ed.) Citation

Bolzano, B., Rootselaar, B. v., & Lugt, A. v. d. (1991). Miscellanea mathematica: 6. Friedrich Frommann, Günther Holzboog.

Chicago Style (17th ed.) Citation

Bolzano, Bernard, Bob van Rootselaar, and Anna van der Lugt. Miscellanea Mathematica: 6. Stuttgart-Bad Cannstatt: Friedrich Frommann, Günther Holzboog, 1991.

MLA (9th ed.) Citation

Bolzano, Bernard, et al. Miscellanea Mathematica: 6. Friedrich Frommann, Günther Holzboog, 1991.