Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.