Παραπομπή APA

Bird, S. R. (2019). Research methods in physical activity and health. Routledge.

Παραπομπή Chicago Style

Bird, Stephen R. Research Methods in Physical Activity and Health. London: Routledge, 2019.

Παραπομπή MLA

Bird, Stephen R. Research Methods in Physical Activity and Health. Routledge, 2019.