APA (7e ed.) Bronvermelding

Zafiris, E., Hovestadt, L., & Bühlmann, V. (2021). Natural Communication: The Obstacle-Embracing Art of Abstract Gnomonics. De Gruyter.

Chicago (17e ed.) Bronvermelding

Zafiris, Elias, Ludger Hovestadt, en Vera Bühlmann. Natural Communication: The Obstacle-Embracing Art of Abstract Gnomonics. Berlin/Boston: De Gruyter, 2021.

MLA (9e ed.) Bronvermelding

Zafiris, Elias, et al. Natural Communication: The Obstacle-Embracing Art of Abstract Gnomonics. De Gruyter, 2021.