Cita APA

Shephard, R. J., Shephard, R. J., & êAstrand, P. (1992). Endurance in sports. Blackwell Science.

Citación estilo Chicago

Shephard, R. J., Roy J. Shephard, and Per-Olof êAstrand. Endurance in Sports. Oxford: Blackwell Science, 1992.

Cita MLA

Shephard, R. J., et al. Endurance in Sports. Blackwell Science, 1992.