APA (7th ed.) Citation

Gaskill, S. E. (1998). Fitness Cross-country skiing. Human kinetics.

Chicago Style (17th ed.) Citation

Gaskill, Steven E. Fitness Cross-country Skiing. Champaign: Human kinetics, 1998.

MLA (9th ed.) Citation

Gaskill, Steven E. Fitness Cross-country Skiing. Human kinetics, 1998.