Cita APA (7a ed.)

Crewe, P., Gratwick, R., & Grafen, A. (2017). Defining fitness in an uncertain world. Springer Berlin Heidelberg.

Cita Chicago Style (17a ed.)

Crewe, P., R. Gratwick, y A. Grafen. Defining Fitness in an Uncertain World. Springer Berlin Heidelberg, 2017.

Cita MLA (9a ed.)

Crewe, P., et al. Defining Fitness in an Uncertain World. Springer Berlin Heidelberg, 2017.