APA (7e ed.) Bronvermelding

Burde, G., Zieschang, H., & Heusener, M. (2013). Knots (Third, fully revised and extended edition.). Walter de Gruyter GmbH & Co. KG.

Chicago (17e ed.) Bronvermelding

Burde, Gerhard, Heiner Zieschang, en Michael Heusener. Knots. Third, fully revised and extended edition. Berlin ; Boston: Walter de Gruyter GmbH & Co. KG, 2013.

MLA (9e ed.) Bronvermelding

Burde, Gerhard, et al. Knots. Third, fully revised and extended edition. Walter de Gruyter GmbH & Co. KG, 2013.