Cita APA

Burde, G., & Zieschang, H. (1985). Knots. W. De Gruyter.

Chicago Edition Citation

Burde, Gerhard, i Heiner Zieschang. Knots. Berlin ; New York: W. De Gruyter, 1985.

Cita MLA

Burde, Gerhard, i Heiner Zieschang. Knots. W. De Gruyter, 1985.