APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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